Valuable paintings are stolen from a charity art exhibit at Britt Reid's home. The thieves make a successful getaway, thanks to a powerful laser beam weapon, and demand one million dollars or else the paintings will be destroyed. Reid goes undercover as the Green Hornet to get to the bottom of their scheme. After a surprising discovery of who is behind the crime, he demands a piece of the action in usual Green Hornet style. And while he prepares to meet their ransom demands as Britt Reid, he also readies the Green Hornet's car, the Black Beauty, for an encounter with their laser.