 Succesfull Colombian importer Aurelio Moreno is found by his wife Julisa Moreno with a  necklace bomb  and a notice pinned on his chest. The bomb squad enters, and loses Al Humphreys, Lieutenant Horatio Caine s friend and former trainer, when it explodes. Autopsy shows Aurelio was under chloroform before his neck-lacing. The team not only investigates the ingenious bomb, with a photocell designed to trigger it when the bomb squad man follows standard disarming procedure, but also the paper- the water mark proves it was imported by Moreno, and used for similar crimes in Bogota, where the bigamist, who is also under smuggle investigation, had a second wife Lauriana, who is currently in Miami and has incriminating chemical traces on her hands, but those can also come from make-up. Then a second bomb is found, different but they manage to disarm it; Horatio spots the boy Conner watching on his bike with a brown paper package and guesses right the kid got that from a stranger who promised he could keep the fashionable BMX if he waited there for him with it- now they have an eye-witness s description. This bomb proves false, Horatio concludes the killer uses bomb squad procedure to manipulate and eliminate them; in fact he excessively shows off how clever he is, which sets him exploring a devious motive...