The novel was set during a house party in the mansion home of Mark Ablett known as the “red house.” Mark had many guests in the party including a widow and his daughter, an actress and a young man named Bill. While the party was going on, Mark’s long-lost brother Robert arrived in the house and shortly after was found dead. Then suddenly the guests noticed that Mark had disappeared. Anthony Gillingham, a very interesting man who just went to the house to call on his friend Bill acted as the “investigator” to the crime. The two “detectives,” Antony and Bill went on to “investigate” the crime and find out who committed it. It will be up to the readers to categorize who among them is Watson and who is Holmes.