Riley and Alice, two sisters now in their twenties and as fiercely different as they are loyal, have spent every summer at their' parents' modest beach house. And every summer growing up, there was also Paul, a close friend to both girls. Now after three years away from the island, he's come back. But his return marks a season of change, of unspoken attractions, tragedy and deep secrets that will launch three friends into an un familiar adult world from which their summer haven can no longer protect them.