Little Woolly leaves her mother behind as she chases a toad down to the river. When the glacial ice breaks, she is swept away in the rumbling, rolling water. Now alone, the mammoth calf struggles to survive. She must sneak past cave lions, bears, saber-toothed cats, and humans. Exhausted and afraid, she must even hide from stormy weather as she fights her way back to her herd. How can she find them? Will she ever get back?