 Tails flies Sonic to visit Angel Island. When they arrive at the island, Knuckels, the guardian of the island attacks Sonic and steals the Chaos Emeralds. As it turns out, Dr. Robotnik crash landed on the island after his Death Egg was destroyed. He has convinced Knuckels that Sonic is the bad guy and must be stopped. As Sonic and Tails fight to stop Robotnik latest evil plans, they must get past Knuckels as well.