During their last weekend together, a group of friends staying at a reclusive mountain house have their fun suddenly interrupted by a knock at the door.

Returning home late to Maple Street, a teen is knocked out by an intruder. But when she wakes the next day to her parents claiming she only fell down the stairs, she suspects they’re hiding a secret.

In 1986, three teens were brutally murdered after knocking on the door of 59 Oakwood Lane. The killer was never found. Over the next forty years, rumors turned to legend, and while few will admit to believing the stories, kids are still warned never knock on the door of 59 Oakwood Lane for fear of what may answer. On this Halloween night, Grace and her friends are going to wish they’d heeded the warnings and never knocked… for the Neverknock…