After a long absence, Larsen and Mrs Mary Johnson return to Phill's castle. They tried to complete the last level. Larsen says it's impossible. There are just too many traps and enemies. But our heroes refuse to believe that and set out to see the level for themselves. Mark, who escaped from the castle, meets Button while our heroes are away. Button offers Mark to team up against Phill. When the heroes arrive at the labyrinth on the last level, they find themselves in an ambush. Their enemies divide and corner them in different parts of the labyrinth. A tough battle lies ahead. But the labyrinth hides more than simple enemies.