During the Iran-Iraq War a soldier named Naser along with three of his comrades-in-arms (Ahmad, Qasem and Mohammad) are sent to the front to patrol and collect information. Naser gave his wedding ring to his fiancee Atefeh, to whom he had just become engaged, just in case he didn't come back from the fighting. To conduct the mission they were planning to take a secret route shown to them by a local guide, but the guide was killed by the Iraqis and the group was obliged to use the main route for reconnaissance. The mission to blow up a logistics bridge along the passage was conducted well but Qasem and Mohammad, who were wearing Iraqi uniforms, were shot as spies. Naser and Ahmad both escaped after being tortured by two Iraqis.