Following the deadly events at home, the Abbott family (Emily Blunt, Millicent Simmonds, Noah Jupe) must now face the terrors of the outside world as they continue their fight for survival in silence. Forced to venture into the unknown, they quickly realize that the creatures that hunt by sound are not the only threats that lurk beyond the sand path.

As teenagers, kung fu disciples Danny (Alain Uy), Hing (Ron Yuan) and Jim (Mykel Shannon Jenkins) were inseparable. Fast forward 25 years, and each has grown into a washed-up middle-aged man seemingly one kick away from pulling a hamstring—and not at all preoccupied with thoughts of martial arts or childhood best friends. But when their old master is murdered, the trio reunites, soon learning that avenging their sifu will require conquering old grudges (and a dangerous hitman still armed with ample knee cartilage) if they are to honorably defend his legacy.

A teenage murder witness finds himself pursued by twin assassins in the Montana wilderness with a survival expert tasked with protecting him -- and a forest fire threatening to consume them all.