A veteran police detective becomes a criminal justice teacher and baseball coach at a local high school, leading him to the most important investigation of his life. Inspired by true events.

Knock Knock is a horror film that combines fear with revenge, hate with justice and responsibility with sacrifice. The bible says an "Eye for an Eye." Rico was just a big fun loving son of a hard working neighborhood business man. The problem is his dad is an undertaker. Some popular high school Students thought he was weird because of it. Rico kept to himself...