Kagi no Kakatta Heya SP

Half a year after Enomoto Kei’s (Ohno Satoshi) disappearance, Serizawa Go (Sato Koichi) and Aoto Junko (Toda Erika) have been going about their regular law practice.

At this point, Serizawa’s client Fujibayashi (Kurobe Susumu), the chairman of a securities company, is bludgeoned to death.

Furthermore, it is Serizawa and Fujibayashi’s niece Ikuko (Kuroki Hitomi) who discover the dead body. Asked about his relationship with Fujibayashi by the detective Kouno (Ukaji Takashi), Serizawa discloses that he was arranging the donation of Fujibayashi’s late wife’s collection of paintings worth an estimated 1 billion yen to an art museum. About a month later, the elderly Asatsuma (Toji Takao) comes to the law firm accompanied by the caretaker of his apartment building Kohiyama (Okada Yoshinori). Asatsuma tells Junko who attends to him that he wishes to find the person who saved his life when he collapsed from a heart attack.

His saviour came to the apartment where he had collapsed, gave him first aid and vanished after calling 119. At the same moment, Serizawa is meeting Ikuko. Although Fujibayashi’s murderer has not been caught, Serizawa would like to proceed with the donation. But Ikuko asks him to halt it. She attests that this was what her uncle had said he wanted the day before he was killed. On another day, Junko is making inquiries with the residents of Asatsuma’s apartment building when a man comes, led by Kohiyama. He is Enomoto. He tells Junko that he has been called to install a new security camera and is taken to Asatsuma’s apartment. After that, Serizawa makes Ikuko have a face to face meeting with Hiramatsu (Sano Shiro), the director of the art museum which was to have been the recipient. The moment Hiramatsu hears that the donation has been called off, his expression hardens. At that moment, Enomoto and Junko meet a famous artist Inaba Toru (Fujiki Naohito) who is working on a piece for an exhibition. Inaba has created a mock amusement park house of mirrors and the work of art has been mounted in it...