Vortan and his men use a powerful vortex to capture approaching underwater vessels. They turn it on when they pick Moby up on their radar thinking that he is a vessel. Moby and the boys survive the vortex but find themselves trapped between the vortex and Vortan and must fight their way out if they are going to survive. Vortan sends his robot centipede to take care of Moby but Moby breaks the centipede into segments. After defeating the segments Moby and the boys must deal with heat-seeking missiles. They are able to get past the missiles only to have to fight yet another creature. With his last defense done away with, Vortan turns his vortex around risking his own destruction in order to keep his secret invasion plans a secret. Moby once again avoids the vortex and Vortan and his underwater station are destroyed.