Based on a comic book created by Tom Taylor and James Brouwer, "The Deep" focuses on the Nekton family. The Nekton family are adventurous underwater explorers who live in a state-of-the-art submarine named the Aronnax. The family consists of Antaeus and Fontaine and their parents Will and Kaiko and they seek to unravel the mystery of the oceans depths. The family seek Lemuria, a lost city that they are trying to reclaim. With help from Nereus, their guardian, they seek to pursue the riddle that will take them to Lemuria.