At Oxford University, a professor and a grad student work together to try and stop a potential series of murders seemingly linked by mathematical symbols.

Set in 1982 in the suburb of Blackeberg, Stockholm, twelve-year-old Oskar is a lonely outsider, bullied at school by his classmates; at home, Oskar dreams of revenge against a trio of bullies. He befriends his twelve-year-old, next-door neighbor Eli, who only appears at night in the snow-covered playground outside their building.

While standing in the doorway of the video shop where he works, Bazil is inadvertently shot in the head. Now homeless and jobless, he is taken in by a troupe of misfits who live in a giant mound of trash. There Bazil begins his quest for revenge against the people who produced the gun that shot him.

A rich man's daughter is held captive in an abandoned apartment by two former convicts who abducted her and hold her ransom in exchange for her father's money.