With two map pieces secured, Sugimoto ans Asirpa continue their hunt for the remaining 22 tattooed convicts whose bodies hold the key to hidden treasure.
In a Japan of the near future, the government program Plan 75 encourages senior citizens to be voluntarily euthanized to remedy a super-aged society. An elderly woman whose means of survival are vanishing, a pragmatic Plan 75 salesman, and a young Filipino laborer face choices of life and death.
Newlyweds Nana and Shota move into an apartment. Two situations, different from the drama series, take place: "What if Shota attends the resident's meeting and not Nana?" and "What if exchange murder game doesn't begin?"
In 1964, Momoko came by herself to Tokyo from her hometown. She met Shūzō and married him. They raised two children together, but Shūzō suddenly passes away. Momoko is dumbfounded by being alone again. She begins to go to the library and borrows books. This changes her life.