Sonia, after getting really dirty on one of her missions, flips out and drives off to East Mobius; Sonic and Manic follow her after receiving news that Queen Aleena had been spotted there. There, Sonia is reunited with an old friend, Mindy LaTour, and her father. Mindy gives Sonia a watch. Unknown to the girls though, the timepiece is a tracking device designed by Robotnik. Sonia finds out too late, and soon, Mindy's estate is swarming with similar wristwatch-style robots, all programmed to capture the hedgehogs! Can the siblings stomp out this bug problem?