The film is set in World War II (1939-1945) and takes place in Burma, a neighboring country in India. The Japanese troops have begun the invasion of this nation and intend to join their German allies to later access India.
General Frank D. Merrill has managed to gather three thousand volunteer soldiers in the infantry brigade in order to stop this advance of the Japanese troops. To do this they must make a surprise attack plan by hiding next to the enemy lines. Despite the difficulty, Merrill’s soldiers manage to destroy the Japanese base, but after that they order a new assignment. This new mission is even more risky than the previous one since they will have to cross the jungle to destroy a train track. The most dangerous thing here will not be to go unnoticed by the enemies, but to survive the unknown jungle.