The epic journey of 7 mothers and their newborn calves from Florida to the Canadian Maritimes are followed in a deep dive into the lives of one of the most endangered whales on Earth, the North Atlantic right whale. With remarkable access, we experience the splendor and the plight of this great whale through the eyes of a closely-knit team of marine biologists, whale disentanglers, aerial survey teams, ocean advocates and indigenous leaders as they race against time to save the species from extinction.