Placed in an unsavory orphanage, Eartha waits for time to pass, trying to preserve her memories despite successive "wipes." On her fifteenth birthday, her cat, Gremlin, brings her a message from her father, Justin, the violin-maker. She's swept up in a strange historical, magical, and above all, dangerous treasure hunt. But she will have to evade the intrusive surveillance of the drones and cameras circling the city. Will she be able to find her father and her memories and unravel the mysteries of the Guild of the Arts?