Welcome to Soleanna, the breathtaking city of water! This exquisite world is where we find action hero Sonic the Hedgehog, living for the first time among humans. In Soleanna, Sonic has met the beautiful princess Elise whom he quickly befriends. Things couldn't be better for the pair until the sinister Dr. Eggman abducts Elise in an attempt to destroy her precious kingdom. In this state-of-the-art, action-packed adventure, Sonic and his friends must speed their way around brand-new 3D levels and take on never-before-seen enemies, including the illusive Silver. Using a next-generation physics engine, Sonic's moves and environment are more spectacular then ever. As the mysteries unravel, it becomes imperative that Sonic and friends rescue the princess and annihilate Dr. Eggman, bringing safety and serenity back to the people of Soleanna.