Discouraged by a recent deadbeat dad case, PI David Randall wonders if he should close the detective agency he operates from his psychic friend Camden’s boarding house at 302 Grace Street in Parkland, North Carolina. But Doreen Padgett, a scrappy teen, convinces him to find her useless father, Arliss. Arliss and Doreen’s mother have divorced, and Doreen wants the man to pay what he owes her family. It’s another deadbeat dad, but Randall agrees to take the case. When policeman Jordan Finley comes to Grace Street with a blouse he wants Camden to touch, a blouse that belongs to the victim of a suspected serial killer, a man with a bizarre fondness for blond hair. Camden has a serious reaction to the blouse, but can’t see anything that will lead to the killer except a hatred for a woman named Margaret. Despite Cam using an accident as an excuse not to be psychic, Randall finds a connection to Margaret, Arliss, and the serial killer. All of them plan to attend an upcoming high school reunion, the same reunion Cam’s wife Ellin is looking forward to. Randall has to find the killer, especially since he realizes that except for himself, everyone who lives at 302 Grace Street is blond. Gone Daddy Blues is the seventh in the Grace Street Mysteries, the continuing adventures of the family and friends who live at 302 Grace Street.