When a corpse is found with highly unusual injuries, Jeremy Wade instinctively knows he’s on the trail of a new monster. Digging deeper, he soon uncovers the dead body is only the tip of the iceberg - there’s also been a spate of unexplained disappearances. And, people have seen a huge unknown creature patrolling the water. Could all three things be connected? To solve this mystery Jeremy confronts one of his biggest fears and encounters a river monster that he’s NEVER dealt with before.