Minneapolis had not fallen the way Dallas had. The Dome had protected it. Lights still worked across most districts. Traffic moved in organized lanes. National Guard checkpoints controlled bridge access while evacuation buses rolled steadily toward the eastern suburbs. Helicopters moved between hospital rooftops and field triage zones along the river. The city looked strained. But alive.
General Roberts studied it through the curved glass of the helicopter cockpit. The aircraft still carried the faded lettering along the tail boom — ALBRIGHT ROOFING. Shane's company. Roberts had smiled the first time he saw it. A roofing contractor's helicopter had somehow become one of the most valuable reconnaissance platforms left in the Midwest.
Below them the Mississippi cut through the city like a long black scar. Bridges spanned the river at regular intervals, each guarded by armored vehicles and infantry positions. Floodlights illuminated the banks where engineers had cleared vegetation to prevent ambush. The pilot lowered the aircraft slightly. "National Guard command post should be near the University bridge, sir." Roberts nodded. "Take us down to a thousand feet."
The helicopter descended along the river corridor. An Abrams tank sat positioned at the northern approach to the bridge below them. Infantry squads moved along the concrete embankments while portable floodlights swept the waterline. The defense looked disciplined. Prepared. Roberts felt a flicker of cautious optimism. If any city could hold a river line, it would be one like this.
The radio crackled. "Command to Pump Station Three. Status check." Silence. Another voice answered. "Maintenance team was supposed to report back thirty minutes ago." Roberts frowned. "Water treatment?" The pilot nodded. "Sewer and drainage systems too."
Roberts leaned forward and looked down at the water. The Mississippi moved slow beneath the winter sky. For several seconds nothing looked wrong. Then something disturbed the surface — a ripple sliding through the current at an angle that didn't match the flow of the river. The pilot noticed it too. "You seeing that?" Roberts raised his binoculars. The ripple spread again. Then vanished.
The radio erupted. "Bridge Two checkpoint requesting immediate backup!" Gunfire cracked through the headset. "Contacts emerging from the riverbank!" The helicopter banked toward the bridge. Floodlights below swung wildly as soldiers repositioned along the embankment.
Roberts watched through the binoculars. At first nothing. Then the riverbank moved. Dark shapes pulled themselves from the water, climbing the concrete slope with unnatural speed. Soldiers opened fire immediately, muzzle flashes lighting the embankment in rapid bursts. Several shapes dropped. More followed.
"Jesus," the pilot muttered.
The creatures did not rush the soldiers. They moved toward the drainage outlets cut into the concrete wall. One soldier fired a grenade launcher into the cluster. The explosion tore through the riverbank, throwing bodies into the water. The survivors vanished into the storm drain. Roberts lowered the binoculars slowly.
The radio erupted again. "Contacts entering sewer system!" The pilot shook his head. "That's not good." Below them the checkpoint held for another minute. Then a manhole cover launched into the air. Something climbed out. Then another. And another. Gunfire erupted in every direction as soldiers suddenly found enemies behind their own line. The bridge defense collapsed within seconds.
Roberts exhaled. "Take us higher."
The helicopter climbed. Across the city more gunfire echoed. Reports flooded the radio network. "Multiple drain breaches." "Sewer tunnels compromised." "Contacts inside the industrial district." The pilot glanced over. "They came through the pipes." Roberts looked down at the river again. The surface moved strangely — ripples sliding through the current in patterns that weren't random. Organized. Thousands of them. They were leaving the city. Following the river.
On the University bridge the situation deteriorated rapidly. Captain Miller watched another manhole cover burst upward fifteen yards from his position. A mutant hauled itself from the opening and lunged before a soldier dropped it with three rifle shots. More were coming. "Engineers!" Miller shouted. "Set the charges!" Two Army engineers sprinted toward the bridge supports where demolition lines had already been prepared. The plan had existed for days. No one had expected to use it this soon.
Another wave surged from the storm drains beneath the bridge approach. Soldiers fired in controlled bursts while the Abrams rotated its turret toward the riverbank. "Canister!" the tank commander shouted. The main gun thundered. The round tore through the cluster of creatures along the concrete slope like a massive shotgun blast. Bodies scattered. More emerged from the water.
Miller keyed his radio. "Command, we cannot hold the sewer access points!" Static. Then a voice came through. "Bridge evacuation authorized. Repeat — prepare demolition." Miller turned toward the engineers. "How long?" "Two minutes!"
Civilians still crowded the eastern lane — families loading into buses and pickup trucks under National Guard escort. Miller raised his voice. "Move those vehicles now!" The convoy accelerated across the span. Another manhole cover launched skyward. Mutants poured from the opening and slammed into the defensive line. Soldiers fired point blank. The tank fired again. The shockwave rolled across the bridge. An engineer shouted from the support column. "Charges set!" Miller waited until the last bus cleared the span. Then he gave the order. "Blow it."
The explosion tore through the center of the bridge. Concrete shattered. The middle section collapsed into the river with a roar of falling steel. On the western side dozens of mutants still climbed from the storm drains. But they would not cross here.
From the helicopter Roberts watched the explosion ripple across the water. Another bridge further south detonated moments later. Then another. The military was cutting the city off from the river. The pilot shook his head slowly. "They're abandoning it." Roberts studied the river again. The surface moved like something alive, ripples sliding through the current and branching outward into tributaries. The creatures were not gathering at the destroyed bridges. They were leaving. Migrating.
"They're not attacking cities," Roberts said quietly.
The pilot frowned. "Then what are they doing?"
Roberts keyed the radio. "All commands, this is Roberts." The channel went silent. "Cities cannot contain this threat." He looked south along the winding course of the Mississippi. "We track it." The helicopter turned and began following the river downstream. Below them Minneapolis burned in controlled fire lines as the military continued destroying crossings behind the evacuation. The skyline still stood. The lights still worked. But the river had already moved on.
The helicopter followed the river south for nearly twenty minutes before anyone spoke again. The city shrank into a grey shape on the horizon, smoke columns climbing into the winter sky where bridges had once crossed the water. The pilot adjusted the collective slightly. "Never thought I'd watch a city get cut loose like that." Roberts kept his eyes on the river. "You didn't." The pilot glanced at him. "Sir?" "You watched the military prevent something worse."
Roberts unfolded a paper map across his knee and traced the river south with a gloved finger. The Mississippi was not a single river. It was a system — tributaries splitting from the main channel like veins spreading across the continent. "Where do you think they're headed?" the pilot asked. Roberts studied the branching waterways. "Everywhere," he said quietly.
The radio crackled. The voice from Minneapolis command sounded exhausted. "General Roberts, do you copy?" "Go ahead." "City evacuation is underway. Guard units falling back east of the river." Roberts nodded even though they couldn't see him. "Understood." A pause. Then the question everyone wanted answered. "General… what are we dealing with?" Roberts looked down at the water. The surface moved strangely even miles from the city — ripples spreading outward in clusters that moved against the current, creatures spreading into side channels. "Migration," Roberts said. Silence. Then: "Migration to where?" Roberts glanced at the map. The Mississippi fed into dozens of rivers. The Missouri. The Ohio. Hundreds of smaller waterways running through farms and towns and cities. "Wherever the water goes," he said. The radio went quiet.
Far below the helicopter something broke the surface. The pilot noticed it first. "Movement." Roberts raised the binoculars. A cluster of shapes moved along the shallow bank where the river curved around a sandbar. One creature pulled itself partially from the water, its body twisting unnaturally as it dragged something with it. A deer. Half eaten. The creature snapped its head toward the helicopter as if sensing the vibration of the rotors. More shapes moved beneath the surface around it.
"Pack behavior," Roberts murmured.
The pilot shivered. "Those things were inside the city drains." "They were inside the river first." Dead fish floated near the surface, several torn apart, others showing strange puncture wounds along their sides. Roberts studied them silently. The ecosystem was collapsing.
The pilot pointed ahead. "Sir. Look at that." A narrow tributary joined the Mississippi from the west, the water at the mouth churning with strange ripples. Roberts watched as dozens of shapes broke from the main mass and turned into the smaller river. "They're splitting up," the pilot said. "Yes." Following the water. Not randomly — systematically, the way a flood followed terrain, finding every low place and filling it.
Roberts keyed the radio again. "All commands monitoring this frequency." Several voices responded. "Go ahead, General." Roberts spoke calmly. "Treat all river systems as hostile migration corridors. This is not a localized outbreak." He paused. "It's a watershed event."
The helicopter flew another thirty miles before the sun began dropping toward the horizon. The pilot checked his instruments. "Fuel check. We'll need to turn around soon." Roberts nodded, but his eyes stayed on the river. For the first time since leaving the city the water ahead looked calm. Then the river bent around a rocky bluff and the pilot slowed the aircraft.
The entire river surface moved. Not ripples. Movement. Hundreds of creatures packed together beneath the surface like a living current, the mass stretching across nearly the entire width of the channel. The pilot swallowed. "That's not a pack." Roberts lowered the binoculars slowly. "No." He watched the dark shapes slide through the water like a migrating herd. They were not hunting. They were traveling. Cities were not their objective. Cities were simply in the way.
Roberts folded the map across his knee. "Take us north." The pilot turned the helicopter. "Back to Minneapolis?" "No." Roberts looked east, toward the network of rivers that cut across the Great Lakes region. "Back to the others." The helicopter climbed and turned into the fading light. Below them the river continued south and the swarm continued with it, patient and vast and entirely indifferent to the lights of any city that happened to sit along the banks.