Beluga whales share their northern kingdom in Greenland with a mysterious cousin: the narwhal. Both species begin a thrilling adventure through a maze of sea ice to their ancestral summering grounds in the Canadian Arctic. Even though they follow ancient migration routes, trouble lurks around every corner. From freezing environments to fierce predators, only their shared knowledge and power of family can get them through safely.

• Brian Armstrong
• Andy Mitchell

• Brian Skerry
• Sigourney Weaver
• James Cameron