Major Murphy, a US Army Investigator, has received a new assignment. Sgt. Gammon is suspected of dealing cocaine from his base, and Murphy must gather enough evidence to shut down Gammon and his entire operation. Along with his partner, Lt. Andrews, the Major goes undercover to infiltrate the gang and find out just how far up the chain of command these activities are going.

US Army Investigator John Murphy (now a Lieutenant, although he was a Major in the previous Base movie) has been sent to look into a series of suspicious deaths that have been going on under the watch of Colonel Strauss. After going undercover and infiltrating Strauss's unit, Murphy discovers that Strauss and his men are leading a vigilante gang to dispense 'justice' to those they feel have been wrongly acquitted of various crimes.