Jack Williams was the best friend of Vietnam veteran and detective Mike Hammer. When Jack is murdered, Mike makes it his business to solve the crime. He is helped by his secretary Velda, and partly helped, partly hindered by the Chief of Police, Pat Chambers. On the trail of the killer, Mike discovers government conspiracies, and plots used by the CIA and the Mafia.

George Hamilton stars in a dueling dual role as twin sons of the legendary Zorro. Soon after the dashing Don Diego Vega inherits his father's famous sword and costume, a broken ankle prevents the masked avenger from fulfilling his heroic duties. When his flamboyantly fashion-conscious brother assumes the secret identity to continue an ongoing fight for justice, the results are nothing short of hilarious!