Documentary following a seal's dangerous migration along the east coast of Africa. Every day is a struggle for survival for young male seals in the untamed waters off the southern tip of Africa. This is the story of a seal who braves the ocean to follow one of the greatest migrations on Earth - the Sardine Run. Each year millions upon millions of sardines move en masse up the east coast of South Africa and their migration awakens a great following of formidable predators. Huge flocks of Cape gannets, thousands of dolphins and hundreds of sharks mount attacks from the air and the depths of the ocean.