An orphaned boy named Tom�s is adopted by Maire O�Donnell to live on a whimsical Irish isle filled with new friends, secret caves and a lost baby pup seal stranded on the coast. But when Maire’s reluctant husband Alec refuses to accept Tom�s as his own son, the boy drifts down a fateful path of adventure and self-discovery, illuminating how rainbows can shine around – and within – us all.