What's the story?
"Grandad was the most important person in Gavin's life." He has always been there, taking care of Gavin while his parents and grandmother work, going fishing with him, making gorgeous models of ships, talking of selkies, understanding him in a way no one else does. When Grandad has a stroke, Gavin is the only one with him, the one who calls the ambulance, holds Grandad's hand until they arrive, and rides with him to the hospital. And, Gavin is sure, he's the only one who can bring Grandad back from his coma.
But as the weeks go by, despite visiting Grandad every day, working with the physiotherapist, spending hours talking to him and reading to him, nothing seems to be changing except Gavin, who's growing increasingly exhausted, hopeless and desperate, and increasingly certain that the key to unlocking the prison of Grandad's mind has something to do with the selkies he loved to talk about.