It was like any other day. Sonic going over to Shadow's house to annoy him for about an hour or two. That was, until Shadow pulls out specialized, unbreakable handcuffs, accidentally clasping his and Sonic's wrist together. On the journey to find the key, will they learn that there's more than just rivalry between them?

It's hard being left behind. It's hard to be the one who stays. Shadow was created to be the ultimate lifeform. Strong, capable, steady, and willing. Some say he is like a time bomb, one wrong move and he can unleash a power so strong you wont stand a chance. Some say he is heartless, a being without emotion. Its not easy to live a lie. To be someone people fear and hate and avoid. Its not easy when you have to hide away because of a secret no one will ever know about. Its not easy to be left behind, and it only gets worse when you are forced to do so. When you are forced to stay behind.