Xu Long Bin is a reservist officer who saved Chen Jin Bao's life during a military exercise. Instead of being grateful, Jin Bao blames Long Bin for his damaged car. From then, the duo never see eye to eye. Lu Jun Guang becomes their mediator and the three men eventually became friends. Jun Guang is in love with Shen Yi Xuan, who cannot get over the memory of her dead boyfriend. While Bai Jing Yu, Jun Guang's childhood friend, is always at his side through thick and thin. New recruit Yao Wei Guo dislikes Yang Xian Feng and constantly picks on him. But Xian Feng proves himself to be a kind and compassionate buddy, and they eventually become good friends. Their friendship is tested when they fall in love with the same girl. Long Bin, Jun Guang and Jin Bao are patrolling a restricted military area when they encounter a terrorist attack. Will they be able to put their military skills to good use and stop the terrorist attack?

本剧紧紧围绕新加坡战备军人、全职服役人员和正规军人的军旅生活展开。陆俊光在国家危难前，与患难兄弟许龙斌、陈金保生死与共，保家卫国，对沈宜萱情谊深重却不敢吐露真情。