A ghost helps the Bowery Boys capture a gang of crooks led by a mad doctor.
When Sach eats too much sugar, he goes into a trance whereby he's able to predict the future. Slip tries to make some money off of Sach by using him as a fortune teller in a carnival, until a mad scientist kidnaps Sach to use him in an intelligence-switching experiment with a monster.
Slip and Sach are in the sidewalk star-gazing business when they see a murder committed in a room at the El Royale Hotel.
