In 1944, in eastern part of China, U.S.Army Major Baldwin and his volunteer team of demolition engineers are left behind the retreating Chinese forces. Their task is to slow down the Japanese advance into eastern China by blowing up bridges, roads, airfields and munitions dumps. They start by blowing up an American airfield and ammo dump. They receive the order to destroy a vital bridge over a mountain pass.The team uses a few army trucks to move around. At the bridge, they encounter a
