Several kidnappings and burglaries have been committed by someone who has managed to evade the police and security guards, but there have been no ransom notes and no high-value items taken. After a friend of Margot's also vanishes,The Shadow investigates and discovers an abandoned sewer system in the area where the crimes have taken place. During a search, Margot falls through the floors of a rotting tunnel and ends up in a place filled with chained captors.