A charity art auction at Britt Reid's apartment is interrupted live on television by three masked, gun toting criminals. The police are nearby and manage to wound one of the thieves, but before they can arrest the other two, a laser is unleashed on their squad car.
Later, one of the thieves telephones Britt Reid, demanding a million dollar ransom. If Britt doesn't pay, the thieves will destroy the stolen paintings, which Britt has insured for one and a half million dollars with his own money. As the Green Hornet, Britt decides to interrogate the captured thief at the hospital, but arrives too late as one of the other thieves has incinerated him with the laser. Tailing the assassin leads the Hornet to the man in charge of the robbery.
Later, Britt agrees to pay the ransom, but the thieves want Casey to deliver it. Green Hornet first uses a tracking device and then the scanner to track the thieves back to their hideout. Using special paint on the Black Beauty, Green Hornet & Kato are able to defeat the laser and catch the crooks.