Based on the actual 11-day disappearance of famed mystery writer Agatha Christie in 1926, the film fictionalizes her whereabouts during that time. When her husband announces that he is leaving her for another woman, Christie creates a mystery out of her own life by hiding in a Harrogate hotel and plotting revenge on her spouse while all of England searches for her. The reporter who finds Christie tries to foil her plan and finally falls in love with her.

爱丽丝（劳米·拉佩斯 Noomi Rapace 饰）曾经是隶属于中情局的高级审讯官，在一次反恐任务中，她的疏忽导致了数十名百姓无辜丧生，受不了良心谴责的爱丽丝选择了辞职，并且彻底放下了过去，开始尝试着去过普通人的生活。　　可就在爱丽丝渐渐以往了曾经的日子时，中情局找到了她，邀请她再度出山协助破案。在破案的过程里，爱丽丝渐渐发觉了其中的猫腻。种种线索都在表明，在中情局中隐藏着内鬼。就这样，爱丽丝凭借着一人之力开始了对于内鬼的调查，这也让她身处险境之中。偌大的中情局里，只有杰克（奥兰多·布鲁姆 Orlando Bloom 饰）在她最需要帮助的时候伸出了援手，可是爱丽丝却并不相信这个神秘的男人。