Rio is a hard looking sap. He rolls with the big boys and plays rough, but in all reality he is a loving and caring sole. He was just in the wrong place at the wrong time. Six, the boy pack leader, found him after a hunter shot him in the leg. In exchange for saving his life, Rio must leave his old pack and come to join his. Having no other options Rio agreed.
I am not good at putting my thoughts into words so that's the best I can do with the story in my head.