AND THEN THERE WAS LIGHT tells the story of BAILEY, a young girl who defines herself by her equestrian abilities, and her struggles as she loses her eyesight after a traumatic accident. Feeling hopeless and dejected, Bailey's loving parents, CAROLINE and JASON, seek out various options to help her adjust, including enrolling her in a program for seeing-eye dogs, but she is unable to connect to anyone or anything. That is, until CHARLES, the head trainer of Southeastern Guide Dogs, trains Apple, a miniature horse, to be her companion and surrogate eyes.