This is the story of the last seed of a dying tree, exhausted the invasion of evil parasites. Five wonderful creatures go on a journey from its top to the very roots, to save from destruction his beloved home ...

Tokyo, 2080. On the streets of metropolis converged in fierce fighting people, and robots. International peacekeeping force, sent to stabilize the situation, fights in abandoned areas. But in a war with such an unusual and seemingly alien to human nature of the enemy soldiers are beginning to wonder whether what they are doing? Does the machine have become so humane? Or is it people are gradually turning into robots?

Video Game of the famous series, dedicated to the 20th anniversary of the world famous hero Sonic hedgehog. in a fantasy world of Sonic chaos unknown mysterious forces have created a time holes, which delayed the hedgehog and his friends. As a result, the hero will be involved in the unexpected events of its past, and will meet with his classic incarnation the hedgehog Sonic the sample in 1991. Modern and classic Sonic must deal with a mysterious new enemy to save his friends and find out who is behind all these strange events.