A witness who survived the shooting testifies that the night before the tragedy, Sebastian threw a party that ended in a shocking confrontation.

In the aftermath of a school shooting, 18-year-old Maja Norberg is taken into police custody and told she's being charged with murder.

Sebastian's behavior prompts Maja to break up with him. During a police reconstruction of the shooting, memories of that day come rushing back to Maja.

When the trial begins, Maja -- facing a possible 14 years in prison -- testifies to Claes's true nature, and how her 18th birthday took a dark turn.

When Inspector Nilsson grills Maja further about her relationship with Sebastian, she recalls a wild party he threw at the start of the new school year.

On the day of a funeral, guilt-ridden Maja itches to escape her cell. In a flashback, Maja's bond with Samir deepens as Sebastian spins out of control.