Sigrid Josefsson

Twenty years after the brutal murders that shook the community, the darkness has returned. When a school lecture is postponed due to the mysterious disappearance of a student, a group of friends plans a secret party to celebrate an 18th birthday. But the party quickly takes a deadly turn.

A couple of friends break into their school late one night to solve a mystery hidden in the past, only to realize that they are trapped inside with a masked serial killer.