Dear Mummy: We had a murder last night.  Miss Springer, the gym mistress.  It happened in the middle of the night and the police came and this morning they’re asking everyone questions. Miss Chadwick told us not to talk to anybody about it, but I thought you’d like to know.  With Love, Jennifer. Getting a letter like that would have given any respectable parent the palpitations. But unpleasant things like murder are going on in an exclusive school for girls. Late one night, two teachers investigate a mysterious flashing light in the sports pavilion, while the rest of the school sleeps. There, among the lacrosse sticks, they stumble upon the body of the unpopular games mistress – shot through the heart from point blank range. The school is thrown into chaos when the ‘cat’ strikes again. Unfortunately, schoolgirl Julia Upjohn knows too much and she knows that without Hercule Poirot’s help, she will be the next victim…