In Blind Faith, an urban battle between Leonardo and the Blind Ninja starts with Leo being drugged, quickly robbing him of his ability to see. During their fight, Leo's other senses realize there is a second person present, smelling a combination of tobacco smoke, alcohol, damp wool and unclean body odor that indicate a homeless man has become ensnared between the two ninja. Both ninja climb to a nearby rooftop and resume their battle. Leo learns that the blind ninja wants revenge against the turtle for blinding him during a past battle. Eventually, Leo gains the upper hand and runs his katana through his opponent. But he then realizes in horror that his victim is not the blind ninja, but the homeless man he smelt before—Leonardo has taken an innocent life and has lost his honor, and the b