Fourteen-year-old Mia, who is trying to lead a normal life as a teenage girl in New York City, is shocked to learn that her father is the Prince of Genovia, a small European principality, and that she is a princess and the heir to the throne.
Having recently discovered she is the sole heir to the throne of a tiny European principality, fourteen-year-old Manhattan resident Mia writes in her journal about her attempts to cope with this news, as well as with more typical teenage concerns.