In 1839, Emily Lowry’s husband vanishes from Wreckers’ Cay, an isolated island off the coast of Key West where he tends to the lighthouse. As days stretch into months, Emily has to take charge of Wrecker’s Cay and her husband’s duties to support her three children—and a fourth on the way. Unexpected help arrives when a runaway slave named Andrew washes up on their beach. At first, Emily is intensely wary of this man, but Andrew proves himself an enormous help and soon wins the hearts of the Lowry family. And—far from the outside world and society’s rules—his place in Emily’s life, as steadfast now as the light, will forever change their futures.