Matt Murdock, played by Ben Affleck, is the son of a boxer. Seven years ago, in order to save an elderly man who was about to be hit by a truck while reading his newspaper, Matt himself was struck by the truck and came into contact with a strange radioactive waste material. Unfortunately, this led to his blindness. However, after losing his sight, Matt's other four senses— hearing, touch, smell, and taste—became extraordinarily sharp. After rigorous training, Matt developed a radar-like superpower, which allows him to "see" every corner of the city even while sitting at home with his eyes closed. Many years have passed, and Matt has been carefully keeping his extraordinary ability a secret from others...