1) Eric is confronted by an unknown man named Kyle who was witness to a murder Eric committed 3 years ago.
2) Kyle and two others break into Eric's home at night to kill him, but Eric lays a trap and uses stealth to kill the intruders one by one.
3) In a final confrontation, Eric discovers that Kyle was actually the intended victim from 3 years ago, and kills Kyle in self-defense to finish their unfinished business.