The first time Lin Yi buried explosives, the fuse delay was miscalculated by three seconds. The rubble thrown up by the explosion nearly killed him, but he was kicked down by the captain: "Are you going to blow up the Japanese or yourself?" The recruit was incompetent, which affected the entire team. But his father's old coworker, the lame man who worked as a cook in the puppet army stronghold, secretly gave him a piece of paper - the time when the Japanese army column passed, accurate to the minute. The second time, he blew up the rails, causing the train to crash into the bridge and flames shooting into the sky. But before they could celebrate, a traitor appeared in the team. Lost contact on the line, was ambushed by the Japanese army at the next explosion point, and his fallen comrades fell in front of him. He accepted the "single-line lurking contract" written in blood: only recognize one person, and the line will never be reestablished if it is broken. In order to take revenge, he took the initiative to "rebellion" and infiltrated the puppet army. He used the network of coworkers left by his father to pass on false information and used the Japanese army to get rid of the mole. But the bigger picture lies behind: Yamamoto Ichiro saw through his disguise, but instead of killing him, he asked him to transport explosives mixed with sand to blow up the Eighth Route Army's railway. Lin Yi must find the only blasting line between the Japanese army, puppet army, military commanders and workers who are unknown enemies and friends within a month. To explode or not to explode?
