Scientist Pierre Aronnax and his trusty servant set sail to hunt a sea monster. With help from the worlds greatest harpooner, the men discover that the creature is really a high tech submarine with a mysterious leader, Captain Nemo.
This story tells how scientist Dr Henry Jekyll believes every human has two minds, a good one and an evil one. He develops a potion to separate them from each other. Soon, his evil mind takes over, and Dr Jekyll becomes a hideous fiend known as Mr Hyde.