Set against the Sino-Indian War of 1962, the film's main plot concerns a small platoon of Indian soldiers in the hilly terrain of Ladakh. Captain Bahadur Singh (Dharmendra) is a keen young soldier who is in-charge of his platoon in Ladakh. On a visit to Kashmir and Ladakh Brigadier Singh (Jayant), receives news of creeping encroachment by Chinese troops along the border and orders Major Ranjit Singh (Balraj Sahni) to send his officers to secure the posts. Thus begins the struggle of the soldiers, who await further instructions while facing a wily adversary.
The region is disputed, with China claiming it as their own. The Indian soldiers have orders not to fire first and as a result the Chinese soldiers manage to effectively surround them and open fire first. Outnumbered and out-positioned, the Indian soldiers try retreating but the weather is against them. Captain Bahadur Singh makes all efforts to ensure his soldiers retreat safely, sacrificing his life in the process. Soon after his soldiers are killed as well. As a parallel mini-story, before his death, Captain Bahadur Singh falls in love with a Ladakhi girl, Angmo (Priya Rajvansh), while posted in the region. Bahadur Singh also takes Angmo's brother Sonam under his wing as the boy dreams of becoming a soldier one day.