When the government cancels the order for a fleet of Thunderboats, huge speed boats with heavy armament and high tech voiced computers with supreme navigational software, ex-Navy SEALS Spencer and Brubaker need a source of income.
An Earl claims that Spencer's young daughter Jessica is in fact his child and heiress, so she travels with her Uncle Edward to England to the Earl's castle to meet him and check his claims.
Brubaker decides to help the Vietnamese officer who tortured him during the war, when the man's daughter mysteriously disappears on a strange island and he begs him for help.
Dumbfounded Edward is to receive a medal from the Queen of England, Bru falls for a girl whose only interest is the Queen's scepter and Spence fights a robot dinosaur.
Spence tells Jessica about his and Bru's latest adventure of helping their Indian friend find his ancestors' burial ground, just when modern day pirates show up in search of treasure.
Spence and Bru save a young boy raised in the wild from poachers. It turns out he's the only survivor of a long lost expedition and someone wants him dead.
Spence, Bru and their arch-nemesis Hammerhead are afloat on a raft in the middle of nowhere after a skirmish. First they fight, but soon they discover that some of their memories may not be real.
Spence and his nephew are testing the M.A.J.O.R., Morphizing Acrylonitrile JPS-particle Organic Replica or in other words - an android. The M.A.J.O.R. accidentally receives Spence's memory during a scan of its and Spence's brain.
After sharing Spence's memory, the M.A.J.O.R. identifies with Spence and concludes that his mission is to protect Jessica from everyone, whether they are terrorists or Bru and the real Spence.
