When a Lunar Module is attacked by a UFO, Straker makes a split-second decision that endangers the astronauts, but ultimately saves them. Later, he is surprised to find his authority being questioned by his most loyal officer, Colonel Paul Foster, who spearheads a campaign against him. Then an attempt is made on Straker's life...

Foster is suspected of being a security leak, but during the trial, Straker and gang discover that Foster's apartment was bugged and shut down the disreputable business that is selling the spy gear.