On a weekend getaway at a rundown cabin in the woods, Jason, a cautious teen, his crude best friend Colin and his fearless older sister Summer are forced to work together, grow up and save their hard-partying parents from their predatory neighbor intent on feeding them all to her undead family.

Adopted teenager Sara goes in search of her birth mother Abby, only to find the woman in prison for bank robbery and manslaughter. In an upcoming parole hearing, Sara helps Abby win release, and decides to spend the summer with her before leaving for college. But Sara soon finds herself in danger as her mother returns to her former partner in crime….