A group of youngsters are sent to destroy an alien launching base. New recruit Ming does not know the plot and kills another teammate. The captain orders him to continue and soon finds himself becomes a victim of Ming. Getting close to the base, Ming suddenly has a glimpse of Tiananmen images. A voice appears as he is about to destroy the base ...一群年青人被派到月球摧毀外星人發射塔。入世未深的隊員阿明不知道當中的陰謀，行動中他錯亂射殺了另一位隊友，隊長卻吩咐他繼續執行任務。前進途中，阿明不知就里射殺了隊長。在步近發射塔時，阿明腦裡忽然閃過天安門的影像。在他即將要摧毀發射塔之際，一把聲音響起……
