11-year-old Unna travels in time to the stone age with the help of a magic drum.
Sixteen-year-old Tomi trusts no one and does his best to protect his little sister Aino from the dangers of the world. But Aino is changing, fast. Because of his own fear of loneliness, Tomi tries to stop his sister, but he will eventually find out that you cannot control another person by force.
