Set on the rugged north shore of the Gulf of St. Lawrence, Canada, Denis Theriault's powerful debut novel tells the touching story of an extraordinary friendship between two young boys who have both suffered the loss of a parent. Although they have little else in common, the boys come together in their grief and take refuge in a world of their own creation, a magical undersea realm inhabited by fantastical beings. Their imaginations take them on a wild adventure, but as the lines between reality and fantasy begin to blur, their search for belonging takes them on a perilous journey that threatens to end in tragedy.