August 1924. The ghost of Lady Adelaide Compton's husband, Major Rupert Charles Cressleigh Compton, inconveniently turns up at her house party. Rupert has to perform a few good deeds before becoming welcomed to the next level. When a murder disrupts her careful seating arrangement, which of her twelve houseguests is a killer? Rupert of course has a solid alibi as a ghost-- and now he has an urge to detect. -- adapted from publisher info