The story begins aboard the USS Shark, a research submarine exploring the depths of the Atlantic Ocean. The crew discovers a huge metallic object and argues over whether to examine it further.

During the debate, a young scientist takes it upon himself to leave without orders, steals a mini-sub, and docks at the mysterious wreck. He finds himself aboard Captain Nemo’s vessel, the Nautilus.

The game is a first-person point-and-click adventure with many rooms to explore and numerous puzzles to solve.