Jack, Ashley, and their unreliable new foster sister set out to solve the mystery of why whales are beaching themselves at Acadia National Park.

As her beloved grandfather, chief of the Maori tribe of Whangara, New Zealand, struggles to lead in difficult times and to find a male successor, young Kahu is developing a mysterious relationship with whales, particularly the ancient bull whale whose legendary rider was their ancestor.

After losing her mom. Willa is grieving and having a hard time living with her dad and his new family on an island off the coast of Washington State. Her dad tries to cheer her up by taking her whale watching, something Willa's mom used to do. While all the passengers are on one side of the boat, Will encounters a humpback whale on the opposite side. Willa feels so lonely that she starts to talk to the whale--and the whale talks back! The whale, named...