Christie & Company, a band of sleuths from the Cabot School, has expanded to four with the inclusion of new girl, Bi Yun, who's an immigrant from mainland China. Bi Yun, who likes to call herself Blair, is attending the Cabot School on scholarship and loves her new world. But when Blair abruptly drops out of school to help at home, then drops out of sight completely, it's time for Christie & Company to solve the mystery of Blair's disappearance and what is troubling her family in strange and mysterious Chinatown. Why did Blair lie about where she lived, what are all the garments she is carrying across town and who are the strange, menacing men Blair is fearful of?