Mamántula is the boy everyone wants, but also a giant spider transvesting as a human, fruit of a brief encounter in the Berlin Tiergarten, in an alternate past of brutalist saunas, endless subway corridors and detectives with raincoats and hats. Each of Mamántula's lovers are a new victim of his insatiable appetite for revenge and sperm; and each victim, one more thread of the web with which he intends to apprehend the entire planet. Will Golden Dick be able to stop him? Will a couple of lovebirds with police badges get him? Or will the gay community have to step in and take the law into their own hands?

A group of street people plays in a cinematographic version of the 5th act of Henrik Ibsen's play Peer Gynt. The movie contains both fiction and documentary elements.