The monkey escapes from the trunk of Ryuhei's car and heads for Ritsuko's rescue with Yamada and Yamamoto. Around that time, Ryuhei stopped his car at the wharf. When Ritsuko, who had fainted, woke up, she was trapped in the freezer of a ship floating offshore in a tied state. The monkeys arrive at the wharf following Ryuhei and Katsumata. The monkey swims to the ship and finds a door at the bottom of the ship. There were various foreign-made complex padlocks on it. And when the monkey inserts the tool into the keyhole, the time bomb clock is activated. With 10 minutes remaining until the explosion, the monkey unlocks the padlock at a rapid pace.
龍平らの車のトランクから脱出したサルは山田、山本と共にリツコの救出に向かう。その頃、龍平らは埠頭で車を停車。気を失っていたリツコが目を覚ますと、縛られた状態で沖に浮かぶ船の冷凍庫に閉じ込められていた。サルたちは龍平、勝又らを追って埠頭に到着。サルは泳いで船に向かい、船底に扉を発見する。そこには様々な外国製の複雑な南京錠がかけられていた。そしてサルが道具を鍵穴に差し込んだその時、時限爆弾の時計が作動。爆発まで残り10分、サルは急ピッチで南京錠を解錠していくが…。
