Adeline, a traditional woman who dreams only of marriage with her fiancé Noah, suddenly receives a letter announcing that he is terminally ill. In reality, Noah—an arrogant noble who values freedom and dislikes commitment—fabricates his illness in order to force a breakup.

Believing his plan will finally free him, he is instead met with Adeline rushing to his side, determined to nurse him through his “final days” and refusing to accept any separation. As his carefully constructed lie spirals out of control, Noah finds himself trapped by the very fiancée he tried to escape, while Adeline’s stubborn devotion reveals a far more intense and unpredictable side of her than he ever imagined.