Change the Past! The Final Confrontation with the Mastermind

テセウスの船 E10: Bungo is arrested after a crime diary is found on a word processor and potassium cyanide is discovered in the garden. Bungo admits and claims to be the serial murderer. Shin and Kazuko are shocked after Bungo tells them to cut ties with him. Is Bungo really the murderer, or is this all part of the mastermind's plot? Shin and his family are shaken to their core. How will their family, now torn apart, overcome their greatest crisis yet? A final message from the mastermind as Shin pursues the truth, and he is forced to make the ultimate choice. In order to change the past and save his family's future, Shin makes a certain decision. The final confrontation with the mastermind approaches, and the truth behind the incident will be revealed. How will this affect Shin and his family?