抗日战争时期，搬运工人李成临危受托，须于即晚十时将讯号枪交给游击队，以抗击日军。李成受雇高家，欲借高家迁居省城顺道将讯号枪偷运。李成驾驶货车，载着汉奸、游击队员、热血护士、潜逃的慰安妇、教员及其怀孕妻子上路，并暗中负责运送抗日工具。李成途中遭日军百般逼迫，讯号枪被搜出，男丁全被拷问。日军以炸弹要胁供出游击队总部所在。众人终合力制服汉奸，完成任务。

During the anti-Japanese war, truck driver Lee Sing's secret mission is to transport weapons and supplies for the resistance fighters. Sing has to deliver a signal gun to guerrillas at ten on that night for launching an attack against the Japanese soldiers. He works for the Ko's family and he has to send the gun to the provincial city to prevent it from being bombed. Sing carries on his vehicle a group of passengers including a Chinese traitor, a guerilla, a compassionate nurse, a comfort woman on the run, a teacher and his pregnant wife. Sing is given a hard time by the Japanese troops on the road. The Japanese ransack the vehicle and they find the signal gun. All the males on board are being interrogated with torture, but the passengers pool their efforts to subdue the traitor and accomplish their mission.