In 1923, two young ladies depart, unescorted, for a tour of Europe. Their great naïvité and efforts to seem grown-up lead them into many comic misadventures.
Captain Ralls fights Dutch shipping magnate Mayrant Sidneye for the woman he loves, Angelique Desaix, and for a fortune in gold aboard the Red Witch.
A rough and tumble man of the sea falls for a meek librarian.
Pickpocket Kitty's life changes when painter Thomas Gainsborough makes her portrait. The artwork gains the attention of Sir Hugh Marcy, who later decides to use her for his benefit.