Kumo, a tapir spirit―known as 'baku' in Japan―devours children's nightmares for survival and the bustling city of Tokyo is the best place to hunt. With his sandman, Suna, they travel through dreams searching for late night snacks. But when he's attacked by a fellow baku, Suna takes him to safety in a distant village. Kumo feels a strange connection to it―one he doesn't understand. His confusion worsens when he discovers that in this town, children aren't the only ones having nightmares. Four adults in particular are plagued by haunting dreams, and Kumo's what they fear.