Narumi Kase (Masami Nagasawa), who works at a design company, has long been in love with her husband Shinji (Ryuhei Matsuda). However, when her husband went missing and came back, she found that he seemed to have lost his memory and was ignorant of everything around him. At the same time, a bloody murder occurred in the family of Tachibana in the city, and the whereabouts of the student girl Tachibana Akira (Yuri Tsunematsu), who was an important suspect, were unknown. Weekly reporter Sakurai (Hiroki Hasegawa) was ordered to go to the scene of the crime, but met the young man Amano (Mahiro Takasugi) who behaved strangely. Amano claimed to be from outer space, and he and his kind, including Tachibana, were planning to invade the earth. Sakurai, who was half-believing and half-doubting, followed him on his journey to find Tachibana, while Narumi on the other side also questioned her husband's true identity... This film is based on the stage play premiered in 2005 by Tomohiro Maekawa, the head of the theater Ikiume, and the novel published in 2007.