The extraordinary, demonic monument to Franco broods over the Valley of the Fallen, north of Madrid. Here, in the hallowed seclusion of the confessional box, Eduardo Tomas, Spain's Home Affairs Minister, is gunned down by a manipulative killer. Senior Interpol officer, Marius Larche, heads the investigating team; his number two, Detective Superintendent Alison Rowe, seconded from Scotland Yard because of her special knowledge of one particular political assassin, suspected of the murder. On the beautiful fortress-like island of Molino, they investigate the web of secrecy and suspicion which surrounds the Minister's widow and the whole Tomas family. As Larche and Rowe assemble their suspects in the lavish retreat overlooking the Mediterranean, a ruthless killer penetrates the rigid security.