Seventeen-year-old Mary Churchill feels helpless as London is ravaged by air raids and mandatory blackouts during the seemingly endless war. On a rare night out, she connects with a stranger named Evelyn and, after becoming fast friends, makes plans to meet her again the next day. Except Evelyn never shows up. When Mary searches for her, she finds her new friend brutally murdered.

Horrified, Mary goes to the police. But there's a war happening, and they don't have enough resources to dedicate themselves to the crime. So, Mary takes it upon herself to investigate. And as she gets further into the case, she discovers more shocking murders. All women, all strangled and mutilated . . . all connected.

If Mary doesn't figure out who is killing these women, she could be next.

Against the backdrop of bombings, Mary searches the London for any clues as to who this serial murderer could be and finds herself in a game of cat and mouse with the Blackout Ripper. If only one of them can make it out alive, does Mary have what it takes to make sure it's her.