Part of the Nancy Drew series
When a prince from a relatively minor royal Italian family comes to River Heights, there is much excitement.
He has come to deliver a painting to Mrs Mahoney, a friend of the royal family.
But imagine the shock when, just hours after his arrival, the prince is arrested and thrown into jail.
His family thinks he stole the painting! Nancy and her dad have reason to believe that the prince is innocent.
But can they prove that to everyone else?