Survivors of a sinking ship are rescued by Captain Nemo and his submarine crew. They are taken to an underwater city where they may spend the rest of their lives.

When the details of a secret torpedo are destroyed by an incompetent seaman, the crew of the ship rally round, when the Admiral needs the plans to show to a visiting scientist.

Two Britons—inventor Hengist Pod, and Horse, a brave and cunning fighter—are captured and enslaved by invading Romans and taken to Rome. One of their first encounters in Rome leaves Hengist being mistaken for a fighter, and gets drafted into the Royal Guard to protect Julius Caesar.

The misadventures of hapless cafe owner René Artois and his escapades with the Resistance in occupied France.