Blue Moon is a 23-foot Hirondelle catamaran. The four of them would spend months aboard her. They'd snorkel the reefs and walk the beaches, and in the evenings, they'd gather round the cockpit as Brian fried hogfish over a Coleman stove. Compared to the sailors on the yachts that surrounded them, they had next to nothing, but compared to the life they'd left back in Michigan — a life of hospitals and endurance and tragedy — they had everything they could possibly want. They were a family afloat in the Sea of Abaco, so close to each other that one need only reach out an arm, day or night, to be reminded that, yes, they were still together.