Singapore's most successful movie franchise is back! After completion of their full-time national service stints, Lobang, Aloysius, Sergeant Ong, and Ken Chow were all busy with their respective careers as civilians. When they are called back for in-camp training in an SAF Armour unit, the boys must juggle between work and their duties as operationally-ready national servicemen. Hilarious situations happen when they are back training together and their military roles reversed. New enemy threats arise as their brotherhood is put to the test.