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...