When the decaying body of a murdered woman is discovered, DI Peterson has difficulties establishing her true identity. But as he digs deeper, he has another disturbing case to investigate - the naked bodies of two teenagers have been found with fatal shotgun wounds at the foot of a cliff. As Wesley searches for the truth, both cases become stranger as he uncovers a connection between a sinister manhunt mirroring events from the time of the Napoleonic Wars and an online game that's gripped the imaginations of local teenagers. Then, as a skeleton is found near the place where the dead teenagers were last seen alive, Wesley has to face a terrible truth . . . and a hunt to the death.