If a Tree Falls (2010)

Plot

Siblings Brad and Lisa Carpenter join lifelong friends Will and Vanessa for a road trip to their annual family reunion. Seeking a place to camp for the night, their plans take a horrific turn when they are attacked by six masked assailants, shrouded in mystery and malice. Stranded in a terrifying night of psychological manipulation and physical violence, the group grapples with their survival. As dawn breaks, they confront the chilling reality that awaits them, a fate more horrifying than they could ever have anticipated.