After being wrongly convicted as a traitor, Peter Blood, an English physician, is sent to exile in the British colonies of the Caribbean, where he becomes a pirate.

During an interesting era in the history of Eastern Europe when Russia, under Peter the Great, and Sweden, under King Charles XII, struggled for power, Ukraine was the pawn in the middle. In 1709, Ivan Mazepa, Hetman of Ukraine, which was part of the Russian Empire, signed a pact with the Swedish king promising to support Sweden in its war against Russia provided that Ukraine was given its independence.

For several years as a terrible sea monster drowns ships of the Navy. In a small number of ships that managed to survive, in the sides were found huge holes triangular shape. Now any exit to the sea is deadly, so America sends a special frigate called Blue Star. His goal is to find and destroy the terrible monster. One of the participants of the punitive expedition is a famous Professor from France – Pierre Aronnax. He has a deep knowledge of the mysteries of the deep sea. The search for the monster continues for more than three months, but in the end, the frigate still detects it and immediately starts the attack mode. After an unsuccessful battle with the monster ship goes to the bottom, and the Professor, his servant Conseil and whaler Ned Land get on a submarine and make an amazing journey under water.