Daisy Wells and Hazel Wong have a detective society at Deepdean school for girls. Hazel is from Hong Kong and she and her family moved to England, and she was sent to Deepdean, Form 2. They have only had one mystery to investigate so far, But then on a Monday evening at about 5:30PM Hazel went to the Gym because she had left her cardigan in there, so she went to the Gym, she opened the two doors and saw the dead body of Miss Bell their Science Mistress!! But when she returnes five minuets later with Daisy to see it again, but it wasn’t there!!!!!

This is a really gripping and really good book, it is a very good book because it is a detective book, and it is really good and I love detective books AND it is just awesomeeeeeeeeeeee!!!!!!!!!!!