The story mostly takes place in GCHQ, Cheltenham which is where the Autistic Detective Jonathan Roper has been employed. Hitting a mental block he asks for help from his old partner from book 1. Despite the first three pages indicating this would be an exciting gruesome story the interesting bits are all in the last forty odd pages. An awful lot of time is spent ordering, eating, or describing food. A lackluster, disappointing uneventful read.