it all begin with a series of theft of seemingly unrelated object in a hostel for student on hickory road and london . concern for her sister and who be the housekeeper there and miss lemon asks hercule poirot to look into the matter . he agree and but soon the stake get high when a girl and who have admit that she be responsible for most ( not all ) of the theft and be find murdered . hickory dickory dock be a solid brain exercise and without be a mind numbingly complicate a one and two and buckle my shoe . murder and theft and diamond smuggling be the crime involve and and the final twist that tie everything together be reveal only in the last 2 minute . the character be interesting and particularly the psychology student colin mcnabb and the mysterious american girl sally finch and inspector japp have his funny moment ( in perhaps the close this series have come to toilet humor ) and and miss lemon get a more integral part to the story than usual . ( ) .