This third instalment in the long running cop-&-dog saga sees Detective Dooley (James Belushi) & his police hound Jerry Lee handing in their badges & continuing their fight against crime as private detectives. When they interrupt a computer company robbery on their final night as official police officers, it leads to all kinds of trouble. It seems that Jerry Lee has managed to swallow a microchip discarded by the thieves, & this provides the crime busting duo with the vital first clue in their attempts to unravel the mystery.