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• NVA soldiers battle US Troops for control of a nameless sector near Cambodia border.
  
• Four survivors, passengers of a shot-down US helicopter, try to escape from Vietcong territory.
  
• Surrounded Vietcong soldiers make their last stand against the US Army onslaught in the ruined Catholic church converted into a makeshift weapons depot.
  
• Vietcong subversive group must infiltrate the area patrolled by ARVN and Green Berets using only knifes and silenced weapons.
  
• Commander of the NVA tank platoon decides to launch an all-out attack in a bold attempt to take out US Field HQ.