They erased her past to protect a conspiracy. Now a killer is using her research to erase the future—one memory at a time. Dr. Lena Aris was a rising star in forensic neuropsychology until the FBI framed her for crimes she didn't commit. Three years in federal prison cost her everything: her career, her reputation, and the man she loved—Agent Marcus Cole, the husband who testified against her. Now Marcus is back, with a terrifying case only Lena can solve. A serial killer is targeting victims connected to a secret government memory suppression program—her program. He tattoos the word FORGET on their palms before he kills them, and he's leaving messages addressed to Lena. The killer knows her. The killer knows Marcus. And the killer claims he can make her forget Marcus ever existed. To catch him, Lena must return to the nightmare she escaped: the black budget project called Mnemosyne, the powerful people who buried the truth, and the husband who destroyed her. But as the body count rises and the killer closes in, Lena discovers that memory isn't just about the past. It's the only thing keeping her alive.