The story is about a homosexual photographer Mikael, who finds a young and injured troll from his home yard and takes it to his home. This troll is inspired by Finnish folklore and is an intelligent, almost human-like animal that in appearance resembles a cat and a monkey. In the world of the novel trolls are existing animals instead of mythical creatures, although quite rare.

The book has multiple narrative levels, and each chapter is broken into short segments that alternate between viewpoints of different characters. Interspersed between the story are newspaper articles, old stories, novel segments, jokes and other slightly altered history that illustrates the long relationship between humans and trolls in the world of the novel. By concentrating on gay characters the story explores power structures in interpersonal relationships without the need to consider how gender roles affect them.