Chris is in Cairns working at the local Marlin Coast Vet Clinic. He has a busy time in the tropic north treating a large crocodile that lost a fight and a monster phython which is eating local pets. Chris is called to a local crocodile park to treat a 5.4 metre monster with savage wounds to his snout after coming off second best in a fight. Lisa must deal with Golden Retriever who collapsed while running in the park and is now in serious trouble.