A violent slaughter takes place in an abandoned house in Louisiana, where three high school girls are found dead. Detective Mark Lewis (Frank Grillo) examine the crime scene and finds a shocked survivor named John (Dustin Milligan) before the call in reinforcements. Several police cars arrive on site with an ambulance and a doctor psychologist named Elizabeth Klein (Maria Bello). The latter discusses the survivor who tells him a seance held earlier in the house awakened the attention of several spirits, including one that identified him as his mother. Two people in their group are still missing, and Mark and Elizabeth, with the help of John, trying to understand what happened and where the two missing.