In the Outer Hebrides, Gabe investigates island mail, sea rescues, storm knowledge, and the human watchfulness hidden behind systems that now appear automatic. Eilidh understands weather, distance, and the danger of assuming isolation means simplicity. A light-and-letter Crossing reveals a warning network maintained by people the official logs barely named. Then a sequence shines across the water carrying details the family knows too well. It may be the closest thing to an invitation they have ever received - but another watcher is studying the same horizon.
