At first sight, Marcel suspects his new neighbor, Devin "Dark Lord" Larrson, is bad news. Suspicions are soon confirmed as the burly and oft-belligerent Larrson proceeds to terrorize fellow apartment tenants with his penchant for intimidation and violence.
To distance themselves from this menace, one by one the residents move out of the building, including Marcel's live-in girlfriend. Marcel stays put, and after being pushed too far, he obtains an unregistered firearm and shoots Larrson three times, once in the head.
Left for dead, Larrson survives the attack. After emerging from a coma, Larrson not only doesn't recall the incident -- which relieves Marcel, who is bracing for a retaliation -- but has morphed into a civil and cordial person, even willing to fix the brakes on Marcel's car free of charge.
But as Larrson slowly makes his recovery, Marcel fears old memories and habits are returning, and it will only be a matter of time before he's confronted with the "Dark Lord" again.