Three children - Thomas the Tank Engine, Marie the Fearless, Willy the Wise - and their faithful companion, the parrot Monsieur Moody, love the sea and mysteries. They often go out to sea on a real small ship. The life of little pirates is full of exciting adventures: they came across the Flying Dutchman, they ended up on a deserted island, they returned the world's largest diamond to its owner, they hunted down the chest of the old pirate Morgan. The little adventurers will face many trials, and in the end they will find out what is more precious than all the treasures in the world.
