Dr. Martin Harris (Liam Neeson) went to Berlin to participate in academic exchanges, but unfortunately encountered a car accident. When he woke up from a coma, he found that his entire life had been stolen. His wife Elizabeth (January Jones) no longer recognized him, and another person (Aidan Quinn) replaced his identity and became Dr. Harris. He appeared in the academic conference openly. It seemed that everyone thought that was the real Dr. Harris, which confused Martin. No one believed Martin's words. The local police station in Berlin turned a deaf ear to his complaints, and it seemed that someone began to hunt him down. In a foreign country, without relatives and in danger, are people's memories stolen? Or is there something wrong with their own brains? Or is there a shocking conspiracy behind it? When Martin was desperate, a mysterious woman Gina (Diane Kruger) appeared, and it seemed that she could help him find the truth of the matter...