A truck with enough weapon-grade cesium for a 'dirty' nuclear bomb is stolen. Shortly after a huge ransom is demanded. Charlie accepts his college physics professor friend Dr. Larry Fleinhardt's help and after the beans were accidentally spilled planologist dad Epp's. The fiends however detonate a regular bomb early, as turns out as a distraction to rob the leading art restoration firm's vault. After police work leads to the rogue truck driver and his accomplices, Charlie uses to probability calculus to induce collaboration so the cesium, which is leaking fast, can be recuperated.