Paul Raymond goes missing at sea in search of Treasure Island. A year later, his wife Sally, daughter Jacqui and step-son Mark, set out to follow in his footsteps and find him.

A young girl is found floating in the ocean, tied to a raft. The boat hits a storm and they are forced to bail. Some are washed ashore, and the rest?...

Frau Keller decides that although Mark has provided fresh water, they must still send them over the cliff. Hans-Peter helps them to escape.

Raoul and Jacqui arrive at the Horselord village. Jacqui catches Max going through her things and he tells her how his father plans on marrying her in order to find out about new weapons.

Danni finds Hans-Peter and Thea as Karl was holding them hostage. Hans-Peter tells her of the treasure and the map which they found.

Mark goes to the ship's graveyard to get his solar batteries and runs into Escovar.

Thea shows Dante to a chest in the labrinth, in return he tells her that she was found wondering in the labrinth by The Shadows.

Raoul is captured by the Traders who believe that the Horselords are responsible for poisoning the water supply.

The Old One's set bombs to blow up the submarine - just as Hans-Peter gets the wind generator.

Raoul and Danni set about getting the Horselords and Traders to work together to fight the common enemy - Dante.

The submarine gets moving as the Raymond family escape from Dante. Once all are aboard, the submarine heads out to the fog gap in the Malstrom - to go home.