A monkey told by a detective that he will be arrested on suspicion of continuous theft of a shopping street. The monkey escapes with Minami, who is thought to be an accomplice, and vows to catch the true criminal who made them the criminal. Then, the monkey sets a trap in the shopping district and tries to catch the criminal. However, the criminal cuts Minami and runs away. The monkey asks Mishima, who is familiar with the dark route, to search for a person who has sold art in a flashy manner. The monkey asks Yamamoto and Ritsuko to cooperate in arresting the criminal, tells him that he is suspicious of Minami, and invades the mansion.
刑事から商店街の連続窃盗の容疑で逮捕すると告げられたサル。サルは共犯と思われているみなみと共に隙を突いて逃走し、自分たちを犯人に仕立て上げた真犯人を捕まえる事を誓う。そして、サルは商店街にワナを仕掛けて犯人を捕まえようとする。だが、犯人はみなみを切り付けて逃走してしまう。サルは闇ルートに詳しい三島に美術品を派手に売りさばいた人物を捜してもらう。サルは山本、リツコに犯人逮捕の協力を求め、みなみを疑っている事も伝え、豪邸に侵入する。
