The ice is melting, an ancient meteorite is revealed, and Earth is becoming desolate. The only people who are not affected by the spreading virus are those who share a common characteristic: the mutation of a series of genes. The survivors live in underground cities, and the only thing that connects them to life on Earth is memory; however, a few share the desire to return.

The Sea, a mosaic narrative in the first person by a unique girl, is a lyrical science fiction story that is small and serene, even though it deals with something as grand and resounding as the end of humanity.