A mission to rid the seas of a monstrous creature becomes a terrifying nightmare when Professor Arronax, Conseil and Ned Land are thrown overboard. The huge marine animal which has haunted the water is no living beast, but a spectacular man-made vessel, and the three men find themselves the helpless prisoners of Captain Nemo. Resigned to their fate, they begin a miraculous journey on the submarine ship which can travel through waters never before explored. For the Professor, at least, this voyage is one he would not have missed for the world.