While hiking through Montana's Glacier National Park, a father and daughter are attacked by a raging grizzly intent on protecting her cubs; after visiting the hot springs in a remote British Columbia nature park, a mother and son are mauled by a hungry 400-pound black bear; and, while on a two-week game shoot in the Alaskan wilderness, the tables turn on a pastor and his best friend when they are ambushed by a grizzly.