Yes, Baby Reindeer is based on a true story. It is a story of a reindeer calf who is born into a herd of reindeer and learns to survive in the harsh Arctic environment. The calf's parents teach it how to hunt and find food, and it also learns how to navigate the dangerous terrain of the tundra. The calf grows up to become a strong and resilient adult, and it eventually becomes a part of the herd that pulls Santa's sleigh on Christmas Eve.