A ship with a load of gold disappears after hitting an iceberg. Meanwhile, the Stingray crew is enjoying a shore leave in Casablanca. While there, Troy Tempest is on a date with Marina while "Phones" is offered the chance to buy a purported treasure map for $500. "Phones" only has $200 but blackmails Troy by reminding him he has a date the next night with Atlanta Shore and gets the remaining money to buy the map. However, the map indicates the treasure is out of the way for Stringray’s return course to Marineville. Marina, feeling sorry for "Phones," alters course while Troy and "Phones" sleep. After they awaken, the WASP officers realize what has happened. As the submarine approaches the treasure's location, it is sucked into a whirlpool and ends up in a cavern. There, they are captured by two beings who have been hijacking ships for their treasurer over hundreds of years. Troy and "Phones" must escape on their own because help won't be coming from WASP because no one knows where to look for Stingray.