The cockroaches sabotage the compass. The result? Oggyseus’ ship goes off course, and sails straight into the Mermaids’ waters. Joey does a deal with the mermaids to get rid of Oggyseus and his crew. However, when the little mermaid sings her enchanted song, it hypnotizes Jack, Olivia, and Cockroach Marky, so Oggyseus, Joey, and Dee Dee must rescue the trio before the mermaids plan to eat them.