After Firebase Ladybird suffers heavy casualties, Sgt. Anderson goes to division headquarters to make a report and recruit replacements. He selects the best from a group of new recruits and meets fir the first time their new leader, 2nd Lt. Goldman.

The VC are mauling the American soldiers through their use of the underground tunnels. On their latest trip into the bush, Anderson and the men provide a blocking force, only the Gooks being driven toward them disappear down into the tunnels... and Goldman and Anderson end up firing on Americans -- thinking they are VC coming toward them. The team ends up in a village but again gets attacked as the VC pop up out the tunnels and then back into them after the attack. Taylor is captured during this fighting -- having been wounded. Taylor ends up being befriended by a VC Doc who has no interest in fighting -- only in returning home alive. On the surface, Anderson and Goldman go into the tunnels, only to end up entombed by a cave-in.

Among the villagers being relocated by the platoon is a beautiful woman to whom Goldman is attracted. When they are attacked on the trail, Goldman's life is saved by a VC who turns out to be the woman's husband.

The men find themselves assigned to a 'hot shot' sergeant with a mission to destroy an enemy bridge. Tempers reach a breaking point when Anderson finds a living Vietnamese child and the sergeant wants the child Killed.

The company provides security for an irrigation project, but after several successful ambushes on them, the men of B Company suspect their Vietnamese scout of spying.

Anderson, Goldman, and Captain Wallace are checking out a new weapon that has been added to the platoon's arsenal: a flamethrower. Zeke and Goldman are unhappy that the next mission will also include a beautiful female reporter -- Vicky Adams. Zeke fights against the woman's urges to ""get the good stuff"" and his own men's attempts to impress her -- at the risk of their own lives. A prisoner is caught and tells the unit that they are surrounded by an NVA regiment. Wallace refusees to go back to safety, though, and a bad situation continues to get worse and worse.