Chung and Kin grow up together at Rennie Mill Area with quite different characters. They were admitted into the Whampoa Military Training School at Taiwan. On the way to School, Kin and Chung met with other schoolmates in a train - Cheng, Lin and Wu. The mischievous kin got into trouble with other schoolmates and was punished on the first day of their arrival. The Training Officer, Lam was so strike with his training programme that everyone suffered. Under the mutual care and help, everyone got promoted. However, Cheng was advised not to take part in the field practice for his feebleness. Cheng insisted on trying. At the field practice, Wu, Chung, Kin and Cheng incidentally discovered an ammunition smuggling, this led them to fatal attack.
