アパートの立ち退きを強いられる一橋桐子（松坂慶子）。もう後がない中、次に狙う犯罪は「誘拐」。気づけば桐子の周りにはムショ活応援の仲間たちが集まっており、上司の久遠（岩田剛典）や雪菜（長澤樹）、闇金業の寺田（宇崎竜童）と協力し、雪菜を監禁して身代金を奪う誘拐計画を企てる。雪菜の監禁から脅迫電話、身代金受け取り…と紆余曲折あるも、今度こそプラン通り捕まるかと思えたが、事態は思わぬ方向に動きだし…！？
Kiriko is told to move out of her apartment, and in desperation she decides to pursue kidnapping. By this time a group of characters have formed to assist her prison challenge, including her work boss Kudo Itsuki, the money lender Kazuo, and Enomoto Yukina, a young girl she had befriended. They put together a scheme of kidnapping Yukina and getting a ransom for her. Kiriko somehow makes it through the kidnapping, the phone call demanding ransom and the receiving of the ransom, but when she finally thinks she would successfully be arrested, the matter takes an unexpected turn.
