Courage, Eustace and Muriel take a fishing trip but find out the salior is a little messed up in the head and kindof acts like a villian. The sailor wants to capture a serpent and makes Muriel bait and the serpent takes Muriel under water ( the rest follow except Eustace) under water to only find out that the serpent just wanted an audience to sing opera to. She didn't want to hard anyone. So Courage saves Muriel and they go home on the ship and hold the sailor captive, but Eustace is trapped on an island with monkeys!