After a global catastrophe causes the world to be submerged under water, a small group of survivors aboard a submarine must navigate the challenges of their new reality. As they grapple with limited resources, the threat of disease, and the psychological toll of their situation, they also must confront the question of what it means to be human and how to rebuild civilization in a drastically altered environment. The narrative explores themes of survival, morality, and the resilience of the human spirit in the face of adversity.

The 2986th greatest book of all time