In the second half of this novel, Captain Nemo, along with the Nautilus and its hostages, encounter a series of ever so growing perilous encounters. After leaving the Mediterranean, the submarine continues through the Indian Ocean, where Professor Aronnax, Conseil, and Ned Land witness incredible nautical marvels. However, Ned begins to grow impatient of living in the Nautilus. Wanting freedom from his hellish aquatic prison, he plans to escape.