The most feared of marine mammals, it roams the seas in small pods, is extremely intelligent, and uses a sophisticated hunting strategy that allows it to kill prey six times its size, such as the gigantic gray whale. The orca of Monterey Bay, the largest marine sanctuary in the United States, is at the top of the food chain, unrivaled. This video takes us into the secret world of the Monterey orcas, where hunting seals, dolphins, and whales is the order of the day. A journey to discover a unique ecosystem, which is at risk of extinction due to a killer far more ruthless and cruel than the orca: mankind.