At the center of the novel are two sisters—Eri, a fashion model slumbering her way into oblivion, and Mari, a young student soon led toward people whose lives are radically alien to her own: a jazz trombonist who claims they’ve met before, a burly female “love hotel” manager and her maid staff, and a Chinese prostitute savagely brutalized by a businessman. 

These “night people” are haunted by secrets and needs that draw them together more powerfully than the differing circumstances that might keep them apart, and it soon becomes clear that Eri’s slumber—mysteriously tied to the businessman plagued by the mark of his crime—will either restore or annihilate her.