Harry, Ron and Hermione walk away from their last year at Hogwarts to find and destroy the remaining Horcruxes, putting an end to Voldemort's bid for immortality. But with Harry's beloved Dumbledore dead and Voldemort's unscrupulous Death Eaters on the loose, the world is more dangerous than ever.

Pauline goes on trip and never returns. Did she deliberately vanish, or did she just abandon her life, or is this an invitation for someone to start searching for her? Simon, her fiancé, intends to find out... Several months after the disappearance, Simon learns of Pauline's death abroad. While cleaning out her apartment, Simon discovers that Lazare, Pauline's cat, still occupies his master's apartment. He possesses an extraordinary long-term memory... and a need for revenge!