"The servers are the seven chaos. Chaos is power. Power enriched by the heart. The controller is the one that unifies the chaos." The Master Emerald and seven chaos emeralds are jewels of infinity energy created by the gods themselves. However, there was once a being equal to the Master Emerald. But he was corrupted due to the echidna's influence. The echidna were forced to seal him inside the Master Emerald. But when Chaos used the negative power of the emeralds to become Perfect Chaos, he accidentally awakened the being that was once pure. Years after the events of Sonic Adventure, the being broke free from the Master Emerald, shattering it completely. With the negative energy of the emeralds and a burning desire to conquer all, a sinister hedgehog was created. It decided to take on the name Nega. For it drains all energy from others and turns it into its own power. It has already drained the energy of the Master Emerald. It now has it sights set on users of Chaos energy and the Chaos Emeralds. How can Sonic and co. fair against this new enemy?