When Nayeon's parents call her to bring a date to their annual Christmas week of celebrations, Nayeon is left in a bind because they only inform her two days before she has to leave. On such notice, Jihyo suggests for her to bring one of their friends to the trip.

Jihyo is dating Jeongyeon, Momo is dating Mina and Dahyun is dating Tzuyu
That leaves Nayeon with Chaeyoung and Sana

Sana volunteers to be her date (Chaeyoung is supposedly busy too) and things get a little crazy as Nayeon brings her to meet her family for the first time.