A socially awkward but incredibly intelligent 15-year-old girl, raised by her single mother, suddenly learns that she is the heir to the throne of a small European nation. The revelation comes after the unexpected death of her estranged father, who, unbeknownst to her, was the crown prince of Genovia. Now, she must decide whether to remain in her comfortable life as a regular teenager in San Francisco or embrace her newfound royal responsibilities and take her place as the future queen.