Sonic has just arrived back after the events of Sonic Mania and Sonic Forces, but something is already amiss. What are the huge holes being dug in the ground? And why is Eggman already capturing more animals? The story begins here, with the first of five parts in: "Sonic Returns"!

Miles “Tails” Prower, at your service! When Sonic shows up to let Tails know about Dr. Eggman’s newest plot, a tremor rocks the beach. As some mysteries are solved and new ones begin, Sonic will learn that to succeed, sometimes all you need is a helping hand.

Knuckles the Echidna is the Guardian of the Master Emerald, but ever since Dr. Eggman and Sonic first appeared on Angel Island, trouble has followed. Knuckles still doesn’t fully trust Sonic, so he’s been watching over the Emerald constantly to ensure nobody – robot or hedgehog – gets their hands on it. Now, just as Knuckles finds a safe location, a mysterious figure appears in the shadows…

Ray the Flying Squirrel has been looking for his best friend, Mighty the Armadillo, but he can’t find him anywhere! As he continues his search, he hears something nearby. Could this finally be Mighty, or is it something far more dangerous?

The decisive battle looms. With the fate of the Chaos Emeralds at stake, it’s up to Sonic, Tails, Mighty, and Ray to unite against a superpowered Metal Sonic. It's time for Part 5 of Sonic Mania Adventures: Metal Mayhem!