When tiger sharks gather in great numbers off the coast of South Africa in the summer, it's time to get out of the water, but for shark expert Mark Addison, it's a chance to continue his life's work. Free diving without chain mail or a cage, Mark puts his life on the line in an effort to reveal the true nature of these sharks, debunking the myth that they are nothing more than notorious killers.

When tiger sharks gather in great numbers off the coast of South Africa in the summer, it's time to get out of the water, but for shark expert Mark Addison, it's a chance to continue his life's work. Free diving without chain mail or a cage, Mark puts his life on the line in an effort to reveal the true nature of these sharks, debunking the myth that they are nothing more than notorious killers.