Anna Foster (Mandy Moore) is the daughter of President of the United States James Foster (Mark Harmon). After Secret Service agents ruin a first date, Anna demands less supervision. For his upcoming trip to Prague, the president agrees to assign only two agents to watch over Anna, whose Secret Service codename is Liberty. In Prague, Anna and her friend Gabrielle La Clare (Beatrice Rosen) attend a concert, where Anna discovers numerous agents in the crowd. Believing her father has broken his promise, Anna eludes her protectors with Gabrielle's help. Outside the theater, she asks Ben Calder (Matthew Goode) for a ride on his motorbike. Unknown to Anna, Ben is a Secret Service agent, and he informs agents Alan Weiss (Jeremy Piven) and Cynthia Morales (Annabella Sciorra) where she can be found. When the president learns of her behavior, he instructs Ben to guard Anna without revealing his true identity, to give her the illusion of freedom with a guarantee of safety.