Cheng Nianhe accidentally gets drunk and wanders into the wrong room, mistakenly believing she spent the night with her best friend's older brother, Han Xuyan.
To keep the secret, she agrees to pretend to be his girlfriend and deal with the older relatives who are pressuring him to marry.
Their pretend romance slowly pulls them both in. Just as their act is about to become real, she discovers that nothing actually happened between her and Han Xuyan on the night she got drunk. Realizing she's been tricked, she cuts off all contact with him in a fit of anger, but gradually discovers the true feelings he's been hiding from her all these years...
