In the tradition of Halloween and Friday the 13th comes a terrifying journey of revenge and bloodlust, as a group of high school students pay the ultimate price for their parent's transgressions.

Someone is killing the students at a high school, leaving the obscure message "Knock Knock" written in blood next to the victims. All the murders have some connection to the victim's parent’s occupation. The cops are clueless and the town is in a panic. Who could the killer be? And more importantly why is he doing this? It all links back to a high school prank gone very wrong. A retired detective with a love for the bottle and his beautiful detective protégé try to find a connection between the murders and the victims, but finding this killer will prove to be more challenging than they ever imagined.

Whatever you do... DO NOT ANSWER THE DOOR.