Together with a guy named Tom, in the new exciting online game The Lost Diamond, you will find treasures that are under water. In front of you on the screen you will see your hero dressed in an underwater suit with scuba gear on his back. He will sail forward under your guidance. By controlling his actions, you will have to navigate various obstacles that will arise on his way. Having noticed gold, precious stones and canisters of air, you will have to pick up these items. For them you will be given points in the game The Lost Diamond.