Marin is a supply runner with her own boat that she sails from island to island, delivering whatever anyone will pay her to deliver: letters, flour, even the occasional enchanted lemur. It’s a lonely life, but it’s hers, and she wouldn’t trade the freedom of the sea for anything. Her only companion is a sea serpent, Perri, whom she saved from a fisherfolk’s net.

One day, she sails to Alyssium and discovers the city is on fire. There’s been a revolution, and the empire has fallen. Marin, with Perri, begins transporting refugees, finding them new homes where they can start over. One such refugee is Dax, a composer who refuses to leave behind his instruments, no matter how much she tries to emphasize the gravity of the situation. Intrigued by his stubbornness, his passion for stories, and his charming smile, Marin discovers perhaps she isn’t saving him ― maybe it’s the other way around.