In which the weary travellers, restored by the invigorating sea air atop the Nautilus, observe their northward course along the rich and varied coasts of South America, delighting in the bounties of marine life and the fascinating natural phenomena of these seldom-charted waters. Amid such contemplation, the vessel’s mysterious captain remains elusive, while the companions reflect on the strange and wondrous creatures entrapped by their nets, as well as the delicate balance of nature beneath the ocean’s surface.