Friday and Gannon are working the day watch out of burglary division when they hear that a large quantity of high velocity gelatin dynamite has been stolen from a construction site. Whnen they interview the Night Watchman who tried to stop the crime they get a license plate # for the car involved. Further investigating leads them to a bar patron nicknamed Ziggy. When they finally track him down they find that four of the eight stolen cases are empty and set to go off somewhere in the city.