Wildlife veterinarian, Brett Gardner, is called in to translocate two adolescent hippo bulls trapped in a shrinking dam with an overly aggressive dominant male. The move is fraught with danger as the animals consistently outwit their captors, chomping through lassos and submerging in the cover of deeper water. An exasperated Brett is left with only one option- dive in and meet the 2 ton beast's eye-to-eye in their domain.