It's 1850 and Nellie's best friend, Mary, is gravely ill. To provide Mary with the care she needs, Nellie must break a promise and go on a quest to find the Thompson family. But will they be able to help? And who will Nellie turn to when her own life is in danger? Follow Nellie on her adventure in the third of four exciting stories about an Irish girl with a big heart, in search of the freedom to be herself.