The story is set in 1934 in a girls boarding school in England called Deepdean. When third former 13-year-old Hazel Wong from Hong Kong, secretary to the Wells and Wong Detective Society, discovers Miss Bell, one of the mistresses, dead on the floor of the gym, she rushes to get her best friend Daisy Wells (founder, president and only other member of the detective society). Then, they figure out the murderer. It's amazing!!! Must read!!!!