Sixteen-year-old Penny Capelli has moved with her mom and huge dog, Ollie, to live above a small-town pub owned by her aunt. It's a relief to start over in a place where no one knows her father is in prison. It's summer and the only person she knows is her nerdy cousin, Simon. Soon she meets Simon's best friend, Brent, and Brent's twin sister, Tara, and their pug, Wolfgang. Penny starts thinking this summer won't be so bad after all. But then Ollie digs up a bone in the backyard of the pub. A human bone. And then a few more. It turns out the bone is over twenty years old. Who could it be? Penny and Simon decide to investigate. Together with Brent and Tara, they form the Crime Club. And before long they discover one thing: if you've killed before, you can kill again.