The late Eocene is a time of great change, but not a pleasant one for Earth's life form. Antarctica has separated from the other continents and is slowly freezing, changing the ocean currents. This is playing havoc with the climate, creating environmental disasters worldwide. Into this world has evolved the most fearsome whale ever to live; Basilosaurus. With ocean food stocks in chaos, a female Basilosaurus must search her home in the Tethys Sea from north to south, to satisfy her enormous hunger. And she is also pregnant...