Oskar is a lonely child, in his spare time he finds himself playing with knives and clipping stories of homicides, arson and other calamities out of papers and pasting them in his notebook. At school he is frequently harassed by others, but he can't find it within himself to fight back. One evening Oskar attacks a tree imagining it to be one of his tormentors, Eli appears and the two, while remaining cautious strike up a friendship.
Håkan is Eli's handler and a serial killer. In order for him to feed Eli he must drain victims in the new town they find themselves strangers in. Lately, he is not able to complete his task and finds himself being pushed out of Eli's life by Oskar. When Håkan is unable to escape after trying to bleed out a teenage boy, he burns himself unrecognizably, is arrested and taken to a hospital where he has Eli feed on him. After she has her fill he falls to his death from the seventh floor window. Violence escalates for both Eli and Oskar as Eli has …