Boog, a domesticated 900lb. Grizzly bear, finds himself stranded in the woods 3 days before Open Season. Forced to rely on Elliot, a fast-talking mule deer, the two form an unlikely friendship and must quickly rally other forest animals if they are to form a rag-tag army against the hunters.
Two long-distance best friends change each other's lives when she decides to pursue a lifelong dream and he volunteers to keep an eye on her teenage son.