Third instalment in the 'K-9' series, directed by Richard J. Lewis and starring James Belushi, Gary Basaraba and Kim Huffman. Detective Dooley Belushi and his police hound Jerry Lee finally hand in their badges but continue 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, and this provides the crimebusting duo with the vital first clue in their attempts to unravel the mystery.