Foreign agents are after a substance called "laser rubies" that can power a killer laser beam. Government agents are dispatched to protect the rubies and eliminate the foreign agents.
Enemy agents, led by Ansara, plan to steal laser rubies, avital component of their planned weapon. Government man Egan and his crew have to stop them. The cast has a lot of veterans past their peak but the production is fine with an elaborate computer room that becomes the target of the bad guys in a well-mounted frogman attack for the climax.