Saint-Malo, Brittany, To Lucinde Leon, the youngest daughter of a wealthy French shipowner, the high walls of Saint-Malo are more hindrance than haven. While her sisters are busy trying to secure advantageous marriages, Luce spends her days secretly being taught to sail by Samuel, her best friend—and an English smuggler.
Only he understands how the waves call to her. Then one stormy morning, Luce rescues a drowning man from the sea. Secrets that have long been lost in the shadowy depths of the ocean begin to rise to the surface, but as Luce wrestles with warring desires, she finds that her own power is growing brighter and brighter, shining like a sea-glass slipper.
Or the scales of a sea-maid's tail. With mixed accounts of the woman's last movements, the two begin to question who they can trust—and who they can't—in their seemingly safe haven. Vancouver, Josiah Chang arrives in the bustling city ready to make a new life for himself. The Second World War is in full swing, and Josiah, like so many Canadians, wants to prove his loyalty by serving his country.
But Chinese Canadians are barred from joining the army out of fear they might expect citizenship in return. So, Josiah heads to the shipyard where he finds work as a riveter, fastening together the ribs and steel plates of Victory ships.
One night, Josiah spots Poppy singing at a navy club. Despite their different backgrounds, they fall for each other instantly, and soon Josiah is spending his nights at Poppy's small wartime house.
