As construction begins on the largest marine amusement park in the world, the abuse of killer whales continues, both during capture and in captivity. As the park's head biologist, Mark Tillsdale, and eight crew members head into the waters that surround Santa Catalina Island to hunt orcas during their migration season, one whale fails to escape their net. After a three-year-old orca is captured and torn from his family, the young male is quickly deemed unsuitable for training, killed, and thrown back into the sea. When the mother orca and her pod find her offspring's carcass, they vow revenge. Soon, ocean justice begins as the pod brutally attacks and kills humans along the California coast. After a mature male orca escapes from a marine amusement park and joins the pod, the killing continues, even as marine biologists, land-based law enforcement, the Coast Guard, and others attempt to fight back. Unfortunately they are all about to discover that what human cruelty unleashed, no man can stop. In this gripping tale, a mother whale and her pod become bloodthirsty murders after her offspring is brutally killed by staff from a marine amusement park.