Cleo suddenly transmigrates into a novel as the fake young master, a villain destined to be kicked out of his wealthy family and eventually meet a tragic end. The real heir, Adrian, has just returned after being swapped at birth and growing up in hardship.
Although the Vale family feels guilty, they still favor Cleo, whom they raised, while treating Adrian with distance and strictness. Adrian, cold and stubborn, begins to quietly observe everything, believing Cleo is the cause of his suffering.
Meanwhile, Aria, Cleo’s obsessive childhood fiancée, is deeply attached to him and completely ignores Adrian. Her extreme love becomes dangerous, especially since Cleo knows she is responsible for his future downfall.
Determined to survive, Cleo tries to avoid conflict, stay away from Aria, and not interfere with Adrian’s growth. However, his attempts to avoid the plot only create misunderstandings—making Adrian more suspicious and Aria more attached.
Now, while Adrian slowly prepares to reclaim his place and Cleo desperately tries to escape his fate, their lives become entangled in a chaotic mix of misunderstanding, comedy, and unexpected emotions.