Nemo and his fellow prisoners at the penal colony in Kalpani are forced to build a giant submarine - the Nautilus. As soon as it is ready, Nemo and his confidants plan to escape using the submarine. But when Director Crawley of the ruthless East India Trading Company arrives and demands that the Nautilus be immediately moved to Bombay to be outfitted, Nemo is forced to advance his plans, with whomever he can gather for a crew.