In post-revolutionary Paris, a group of schemers led by General Bounine discovers a disoriented, young amnesiac woman named Anna, who bears a striking resemblance to the supposedly deceased Grand Duchess Anastasia Nikolaevna of Russia. Bounine devises a plan to pass her off as the real Anastasia in order to claim a substantial inheritance from the Russian Imperial family. Anna, plagued by fragmented memories and mysterious dreams, is gradually coached by Bounine to convincingly adopt the identity of Anastasia. Alongside learning royal etiquette, she is taught intimate details of the Romanov family to solidify her claims. Over time, Anna begins to exhibit unexpectedly accurate knowledge of events and characteristics known only to the true Anastasia.

As the conspirators execute their complex scheme, the lines between the real and the fabricated blur for Anna. Her growing resemblance in demeanor and memory to Anastasia captures the attention of various individuals, including émigré Russians and key figures such as the Dowager Empress, who lost her family in the revolution. Anna's journey to acceptance or exposure is layered with intrigue, emotional conflict, and a quest for identity. In dealing with Anna’s potential true heritage, challenges arise that test the loyalty and motives of all involved.