Vietnam veteran John Rambo has withdrawn into a simple and secluded existence in Thailand. Even though he is looking to avoid trouble, trouble finds him. A group of Christian missionaries approach Rambo with the desire to rent his boat to travel up the river to Burma, which is a war zone. The Karen people of the region have endured a brutal rule from the murderous Burmese military. Rambo accepts the offer and takes the missionaries up the river. When...