A strangled teen. A church-going family. A deadly secret no confession can absolve.

Cat may be a grandmother, but don’t let the crayon-covered fridge fool you — her kitchen doubles as a forensics lab and her mind is sharp as a tack. She’s made it her mission to solve the cases the police can’t.

Her sleuthing skills are called on when sixteen-year-old Peter Baer washes up on the banks of the Ohio River — a length of rope wound tightly around his neck.

Peter was a high school football star, honor student and the poster boy for Cincinnati’s Catholic elite. He had no enemies — or so it seemed.

His powerful father, a prominent figure in the diocese, wants the case buried before it tarnishes the family name. But Peter’s grandmother wants justice, and she hires Cat to find the truth.

As Cat digs into Peter’s final hours, she makes a chilling discovery. This wasn’t just a murder, it was a message. And the people behind it are still watching, still waiting, and ready to kill again . . .

Perfect for fans of Steve Higgs, Dorothy Cannell, Lucy Connelly, Ellie Alexander and Richard Osman.

Previously published as Seventh Deadly Sin.