An orphaned boy named Maire O'Donnell adopts Tomás to call home to a whimsical Irish isle full of friends , secret caves and a lost baby puppy seal. But when the reluctant husband Alec of Maire will not accept Tomás as his or her own child, the boy drifts down a huge path of selfdiscovery and experience, illuminating rainbows can shine round - and - within - us all.