This is the story of Danny, a slave who has lived his whole life without any sort of normal human interaction, with the mind and personality of a young child, Danny has only ever learned one lession in life: how to fight. Treated like a dog, including being forced to wear a collar, by his owner/boss, Bart, Danny has been raised to be a lethal fighting machine. Danny fights in illegal gladiator-style fight clubs, where he earns lots of money for Bart as the undisputed champion. After Bart has a car accident and ends up in a coma, Danny meets a kind elderly blind piano tuner. Danny is on the run because he knows secrets some bad guys don't want known. But the piano tuner who uses music to teach Danny some things about the world and about being human in general.