A dolphin is about to be born in the treacherous waters of Shark Bay in Western Australia. Puck, the wise mother, must use all her skills to keep her newborn safe from the sharks that sweep into the bay every year. With the help of her close knit family of females she must teach the vulnerable baby dolphin the secrets of survival. From whistling to her unborn calf, to the first few hours of baby Samu's life and the struggles her eldest son faces leaving home, this film provides a rare insight into the lives of bottlenose dolphins.