Raven learns that she's an Unmemorable, a race that no one can remember. She isn't ready to step into a world with secret societies and wars so she returns to her job as a housekeeper despite Cain and the Unmemorables protests.

When a confrontation with the Battalion ends in blood, she realizes there's no going back to what her life used to be. While she tries to find a way to reverse the Unmemorables curse, she falls deeper into her relationship with Cain and a world where nothing is as it seems.