There is a Tower that rises above all in an alternate world. No one knows who built this or why it was built. One thing is certain, the Tower both casts a large shadow and at the same time is filled with moving shadows... There is a shadow of a boy that climbs this tower. He runs through the shadow of the Tower, solving mysteries and puzzles along the way, and fighting off enemies that try to impede his progress. The boy is not affected by gravity but his movement is restricted within the thin border between light and shadow....