From the Okavango swamps in southern Africa there are stories of a piranha-like fish that hunts in marauding packs, tearing into other fish, and even human flesh. Angler Jeremy Wade heads into the watery labyrinth to track down this deadly swarm.

Angler Jeremy Wade returns to the remote rivers of India's Himalayas to investigate a fresh spate of savage attacks. Jeremy thinks he knows the perpetrator's identity, but his plans to catch the monster hit trouble when he learns it's a sacred animal.