After sixteen years, Mephiles has returned.
Darker and more power hungry...after failing to defeat and kill Shadow, Sonic and the rest of the gang, he Is going to make sure he gets what he wants this time,  by using the power of the chaos emeralds,He infects Shadow with a rabies like disease,  called Muskiomal which makes Shadow a ruthless cannabalsitic killer at nightfall. Not only does Mephiles turn Shadow into a killer hedgehog, he forces him to take out revenge on not only on on Mobians  but the entire universe as well.
 
But only Amy Rose is aware of Shadow's illness after witnessing Shadow consuming human and Mobian remains behind a restaurant dumpster.
Amy vows to keep Shadow's condition a secret not only for the safety of Sonic and the gang but for the universe...but if G.U.N finds out the ultimate life form and their top agent as dangerous... it could result in him being held captive, being  detained against his will and experimented on as long as possible.

Despite the life threatening situation, Shadow and Amy's connection grows closer and closer which ultimately leads to them having an affair which eventually  leads them to being together, much to the disdain of not only Sonic, but to the entire group, unfortunately, it later becomes a  weakness which will give Mephiles a possible one up against the team

Will Amy and the rest of the crew find a cure for Shadow's condition or will he forever be Mephiles' murderous puppet?

(All characters and images used belong to SEGA and their rightful owners.)
All Rights Reserved