The film revolves around the “Blue Whale Challenge” game used by many young people and adolescents, after the spread of technology and the parents are too busy to look after their children which might lead to their exposure to great risks.

Supported by the National Geographic Society, the world’s eminent blue whale scientists embark on a revolutionary mission: They’ll find, identify, and tag California blue whales, use the DNA samples to confirm the sex of individual whales, then rejoin the massive creatures’ stunning migration when they collect at a chimera known as the Costa Rica Dome.

Félix, a 17-year-old boy, receives an invitation on WhatsApp: do you want to play the Blue Whale Game? The one with the 50 challenges? The one where you have to kill yourself at the end? Félix accepts. That is how he meets Elisa. They start completing the challenges together.

The series offers fascinating insights into the most successful animal group in the world. From the tiny Etruscan shrew to the giant blue whale, Mammals will reveal the secrets of their success, and how their winning design, incredible adaptability, unrivaled intelligence, and unique sociability have all contributed to their remarkable rise.

The world’s leading scientists and cinematographers relive 5 extraordinary shark feeding events. From being surrounded at night by 700 grey reek sharks, a 300-strong gathering of blacktip, dusky and bronze sharks feeding on thousands of bait fish, to the spectacular sight of more than 200 blue sharks feeding on the carcass of a seven ton whale; the Great Shark Chow Down is an epic celebration of sharks from around the world.

1975: A 200-ton blue whale gets washed up on a local beach and the kids think it’s the biggest thing that’s ever happened in Australia. Behind closed doors, the Mums and Dads of a quiet suburban street are going to celebrate in their own special way, by joining the sexual revolution and throwing a wife-swapping key party. And like the rotting whale, it’s all about to go spectacularly wrong.