When Seth receives a mysterious letter inviting him to spend the weekend at a secluded mansion in the country, he soon realizes the people inside the house may know him better than he knows himself.。在她的丈夫李遭謀殺之後,莎拉才開始瞭解到她根本不清楚李的過去。莎拉開始去思考,李到底是什麼樣的人?他在具影響力的全球組織裡擔任什麼職務?以及,為什麼像李這樣的業務員需要佩槍?。