Maybe Grampy is at his shack, Nucleus Authentica, inventing something very special? Or maybe he is out at sea? Nine-year-old Leon sneaks out into the woods all by himself just before midnight. Grampy, Leon's grandfather, simply can't be dead and buried - at least not after what the adults keep saying: "The old man is not gone; he is still very much with us." Determined to find him, Leon sets out on his quest. On his journey, Leon is guided by the winged Gabriel, who teaches him to play music from each colour of the rainbow. But soon, Leon finds himself fearing for his life as he walks the tightrope of forgiveness high in the mountains, tumbles into wild rivers, encounters a mischievous mouse, soars in a balloon, and rides on the back of a wolf cub. Finding Grampy is a little hero's journey for all of us - children and grown-ups alike - who are still children at heart and who never stop pondering the questions of life, love, loss, forgiveness, friendship, and the search for one's voice and inner truth.