Doctor Eggman is Sick. Bored, Metal Sonic tries to find the Chalice of Life to help him and runs across the friends of his enemy Sonic the Hedgehog, and one of the Legendary Spirits of Chaos. Will Metal accept their help when the Spirit tests him, or will he attack them to accomplish his goals?

Shadow challenges Amy to develop the skills and patience to coax Sonic to her side. But some old enemies from Sonic's past are trying to destroy the couple before they've paired up. And why is Sonic plagued by nightmares?