Yamaoka Yuko (Ishida Hikaru) and her husband Yoshimasa (Komoto Masahiro) have a son and a daughter after marriage, forming a happy family.For a long time, the family of four has been living happily. However, as the eldest daughter Emi (Ohara Yuno) starts working and the eldest son Makoto (Shimamura Ryunosuke) is admitted to university and lives away from home, the communication between the couple gradually decreases, and the relationship with the children gradually decreases.The relationship also became increasingly distant.

One day, Yuko accidentally won a travel grand prize. Taking this as an opportunity, the Yamaoka family decided to take a family trip.Yuko was full of expectations, hoping to take this opportunity to relive the long-lost family reunion time. However, she never expected that an invisible wall of separation would quietly be erected within the Yamaoka family at some point.