A furry animal unknown to science escapes from the laboratory, finds itself in the middle of a noisy metropolis and hides in panic on the roof of one of the houses. Soon it is found there by a schoolgirl Lou and, realizing that the find, though wild, but quite cute and, most likely, magical, decides to help the animal to escape from the evil scientists and return home to the mountains. The girl is accidentally followed by two neighbor boys, and now the merry company is on its way to the highest mountain peak - Everest.