Someone is targeting Toledo's single women when they turn forty, tucking them into bed and turning birthday greetings into obituaries. Newly-assigned Toledo Homicide Detective Veronica Jadzinski vows to prevent the body count from increasing and to prove her transfer from Narcotics wasn't a fluke-departmental regulations, disparaging lieutenants, and a rigid new partner be damned. Jadz learns to trust a new partner while balancing the unwanted attentions of an almost-ex-husband, a needy widowed mother, and a drama queen sister as the detectives fight to unravel the bizarre murders. When the killer targets Jadz's sister, things get personal. Jadz must heal an old family rift to stop the murders and protect those who really matter.