Katy was the sort of girl who might do anything next, so long as it was something exciting! At 21, she was as eager for adventure as ever, and what greater adventure could there be for an American girl than a trip to Europe?

In this sequel to What Katy Did, Katy Carr has recovered from her long period of paralysis, and is sent, along with her sister Clover, to Hillsover boarding school. The girls fall into friendship with the mischievous Rose Red, and the three of them start a secret club and get into trouble with their teachers. During her time at Hillsover, Katy has a positive influence on the younger girls at the school, while they help her to regain some of her youthfulness, lost as a result of her illness.

Ever since her mother died, 12-year-old Katy has attempted to look after her five younger brothers and sisters. Her father, Dr. Carr, depends on her to set a good example while he takes care of patients. But no matter how hard Katy tries to be good, trouble always finds her. She tears all her dresses and breaks the dishes. She forgets to do her homework, so she gets bad grades. And her quick temper hurts the feelings of those she loves the most. But the day she refuses to listen when Aunt Izzie forbids her to use the new swing changes her life forever.

Katy Carr is always dreaming of the time when something will happen to make her famous. But when it does, it's not at all what she wants. In this moving story, Katy Carr overcomes a tragic accident and learns to be as loving and as patient as the beautiful invalid, Helen.

Far to the south in the Land of Ingary lives a young carpet merchant called Abdullah. In his dreams, he is the long-lost son of a great prince. This dream is a complete castle in the air...or is it? Abdullah’s day-dreams suddenly start to come true when he meets the exquisite Flower-in-the-Night, daughter of the ferocious Sultan of Zanzib. Fate has destined them for each other, but a bad-tempered genie, a hideous djinn and various villainous bandits have their own ideas. When Flower-in-the-Night is carried off, Abdullah is determined to rescue her—if he can find her.