At the end of the XIX century in Russia, Prince Dimitri Necklivdov is called as a jury-man in a trial. The defendant is Katiuscia Maslova, accused of murdering a merchant in order to rob him. Dimitri recognizes Katiuscia: she was the girl he seduced many years before. Dimitri decides to save her.
A socially awkward but very bright 15-year-old girl being raised by a single mom discovers that she is the princess of a small European country because of the recent death of her long-absent father, who, unknown to her, was the crown prince of Genovia.
When a teacher kidnaps a girl from a prestigious school, homicide detective Alex Cross takes the case, teaming up with young security agent Jezzie Flannigan, in hopes of finding the girl and stopping the brutal psychopath.