The natural world is full of amazing stories, but sometimes animals act in ways that seemingly go against all their instincts. From an elephant standing guard over a sick dog, to a giant tortoise adopting a baby hippo, and a lioness that ignores all the laws of nature to look after a baby oryx, this heart-warming documentary examines the cases of animals that have struck up unusual relationships. Delve into the stranger side of nature as we ask, can animals really be friends with other species?