Evert Baackstrom is a rock star among cops. Starring as a TV expert doesn't help his ego or reputation. He thinks he's a genius, and he is, at solving crimes. When a woman's skull is found, it seems she was murdered recently, but DNA points to her death in the 2004 tsunami. Prosecutor Hanna Hwassbelieves it's a mistake, but Backstrom sees a case only he can solve: a woman who has died twice.

Master detective Evert Backstrom is in peak form. He is still making tabloid headlines with his ability to solve murders quickly and efficiently - and arrogantly. But when his rival, celebrity lawyer Tomas Eriksson, is murdered, it proves difficult not to let emotions interfere in the investigation. The evidence points in multiple directions, and before long, more dead bodies are found. The motive connecting the murders seems to be an old music box...