Nell is looking for her missing brother, and she has taken a job serving the princess of Merklestein so she can accompany her on the long voyage to the isle of Antigua. That is where her brother went missing, and that is where she hopes to find him. Nell has to put up with many selfish demands from the princess before she can secure a place on the voyage, but a twist of fate sees the ship leave port with Nell and Olga, the princess’s sister's secretary…and without the princess. Olga then coaxes Nell to pretend to be the princess! Will Nell be able to keep up the ruse during the two-week voyage?