Ji Song-yi found herself a divorced woman, burdened by debt so huge she couldn't even afford a wedding ceremony. Then, her sister Eun-gyu returns from New York without warning, leaving Song-yi with the unexpected responsibility of taking her young nephew, Jay, to English kindergarten. Soon, everyone believes Song-yi is Jay's mother.

While doing "couples counseling" with her ex-boyfriend Jin-ho, Song-yi learns about the secret hobby of his wife, Chan-yang. Yi-an, the cafe owner, suggests an after-work hangout with Song-yi, but this leads to a misunderstanding with Hyeon-woo, a divorce lawyer, who sees them together.