Eight years ago, the heroine's world collapsed: her fiancé betrayed her, her father was imprisoned and died by suicide, and her best friend orchestrated a one-night stand with a stranger—the male lead. Now, returning home for her son's medical treatment, she accidentally mistakes him for a gigolo, setting off a hilarious chain of misunderstandings. He's not a gigolo. He's the father of her child. And he has no idea.