To escape the choking heat of deep summer, Sky and his family survive on stories of the dead in an underground darkness at the end of the world.

Environmental catastrophe has driven four people inside the dark throat of a cave: Sky, a child coming of age; Tie, pregnant and grieving; Mark, a young man poised to assume primacy; and Teller, an elder, holder of stories. As the devastating heat of summer grows, so does the poison in Teller's injured leg and the danger of Tie's imminent labor, food and water dwindling while the future becomes increasingly dependent on the words Sky gleans from the dead, stories pieced together from recycled knowledge, fragmented histories, and half-buried creation myths. From the Caves presents the past, present, and future in tandem, reshaping ancient and modern ideas of death and motherhood, grief and hope, endings and beginnings.