Having been broken apart by the evil Dr. Eggman, it's up to Sonic to put the pieces of the world back together again by retrieving the power of the chaos emeralds! In doing so, Sonic will find himself in a race against time and faced with an unusual situation that will challenge him in ways never before seen. Both day and night play different, yet important, roles in Sonic's newest quest. In the day Sonic takes over, but when the moon appears in the night sky, the beast within Sonic takes over

and rules the night... As the sun sets a new adventure takes play.