"Grandpa has changed a lot. His memory is like a change in the sea, a wave, a boat that doesn't know where it's going." Can there be anything worse than a grandpa who forgets his granddaughter? Although she's very little, Mariana knows some kind words that can transform the pain of confusion into a hug or a smile. This book deals with Alzheimer's among older people, addressed through a sea-faring metaphor between grandfather and granddaughter.