Surrounded in a restaurant, Tracy foils an attempt to steal the ring, and then uses scientific detective work to get a clue: a mattress factory! A secret code message is given to members of the "Dick Tracy Secret Service Patrol." The system cue has been deleted. The Black Pearl of Osiris belong to an Egyptian society dedicated to the ancient worship of the god of Osiris is desired by a gang of thieves and murderers. Dick Tracy has concealed the pearl in the compartment of a mysterious ring given to him by Hummi Battique of the cult of we heard how Dick Pat and Junior while dining in a restaurant suddenly realized they were surrounded by henchmen of the murderous band.