Yosuke Tomikawa (Tomokazu Miura) is married to Mizuki (Hitomi Kuroki). They have a daughter, Shiori (Atsuko Maeda), and son, Ko (Asuka Kudo). Yosuke works as the general manager in the personnel department at a large company. His wife works as a teacher at a private middle school. Their daughter works as a jewelry maker and their son is looking for a job. The family appears to look like a peaceful family, but, due to an accidental opportunity, the family begins to collapse.