Once upon a time, in the oldest, the deepest and the purest lake, a lake where dangers wait for you just around the corner, a miracle happened. In a small snow cave, a small but curious and brave nevertheless baby seal Uma was born. A long-distanced journey to the unknown Ushkany Islands is ahead of her. A journey full of threats and miracle rescues, the one she has to make on her own. Will the mighty lake Baikal help Uma to reach her destination and see those cherished islands?