Life as the sister of a serial killer is never easy, especially when former runaway Mari Del Lobo becomes a target herself. A recent crime has her late brother's signature and MO, which Mari finds highly unusual, as she still blames herself for her only sibling's death. Mari encounters an unexpected -- and a very attractive -- ally in Dr. Luke Goodman. Luke couldn't save his fiancée from the Smiling Killer, but he'll do anything to prevent more murders, even ask for help from the serial killer's sister. Finding a kindred tortured soul in Mari, Luke is determined to keep her alive, but it's not easy to protect the stubborn ex-rebel. To solve the mystery, renew her faith, and find love and redemption, Mari has to face her most dangerous enemy -- herself.