With two major investigations now closed, fish and wildlife police officer Luke McCain is called upon for his most high-profile case yet. En route to the Washington State Fair, an exotic cat show's trailer is stolen. After some of the big cats are released into the Cascade Mountains, McCain and his dog Jack try to locate the show's most menacing member: a Bengal tiger. Meanwhile, there are rumblings that a wild cougar has killed a dirt biker in the region. While news crews flock to McCain's neck of the woods, he must stay on the trail of both big cats before anyone else falls prey to the predators.