Lemon Lister's dog, Milo, has a bad habit of finding dead things. Which is why Detective Zahn enlists his help to find a missing San Francisco police officer. And Milo doesn't disappoint. Unfortunately, the corpse Milo finds in Golden Gate Park belongs to Lemon's girlfriend–Jade's– ex. Now Jade is in jail on suspicion of murder. Lemon and the unstoppable Basset Hound with his discerning nose must find the real killer and exonerate Jade.