The story starts with Tails over the portal in Angel Island deciding to round up the "Triple Threat" to end King Shadow's reign over Mobius. He first heads to the Guardian tower where Knuckles, Shadow's chief enforcer is training his daughter Lara-Su. Tails revealed that he knew of the other time-line when things were peaceful. Tails tries to persuade Knuckles to join him, but Knuckles threatens Tails saying that he'll arrest him if he doesn't get out.