Once a year, in a secret cove in Taiji, Japan thousands of dolphins are driven into a hidden area behind fences and barbed wire. Then trainers from marine parks around the world fly in and pick their favorites and pay extraordinary prices for the dolphins. The public is allowed to watch the trainers select their dolphins, but not when the remaining creatures are herded into another area and slaughtered. It is estimated that each year Japanese fishermen slaughter more than 20,000 dolphins. The struggle to stop the slaughter is documented in The Cove.