Abandoned by her father and mourning the sudden loss of her mother, twenty-two-year-old Fina Fitzgibbons seeks out a living by establishing a cleaning service in Brooklyn called Lucy’s. But when she finds a body on a busy sidewalk in the heart of the Heights, she dusts off her PI license and begins searching for the killer, only to discover that the strangled woman’s four-year-old grandson is missing. A desperate hunt begins for the kidnapped child. During the chase, Fina resists falling in love with her boyfriend, Denny, an NYPD patrol officer, steps on the toes of Detective First Grade Jane Templeton, and uncovers secrets about her mother’s death. In the end, the killer has a vicious surprise for Fina.