Ten-year-old Alex Griffin has plenty of secrets. At night, from his third-floor bedroom in a drafty Victorian mansion, Alex surveys the world and dreams about how life would be if he weren't taking care of his single, alcoholic mom, Allegra Bellini. He confides his secrets to his beat-up toy duck, Dudley. Dudley answers him. Excited Light is a tale of magic and second chances. Young Alex, guided by Dudley and the mysterious entities who visit him, endures his mother's drinking, waiting for a time when she can hear her own spiritual guides. Impulsive Allegra rushes into a reckless romance with Raf Neri, the managing editor of the local newspaper. Neri sweeps her away on a wild ride of nightclubbing, sex, and promises. Then, Neri goes a step too far, taking Allegra to the brink of death. It's up to Alex to save his mother. Guided by Dudley and his angels, he attempts to work a miracle to set his mother free from her addiction.