Time Machine (1991)

A group of students from the city go on a jungle trip with the help of a young hunter as a tour guide. A forest fire forces them to escape for their lives. The group gets lost and stumbles into the Myanmar territory in the middle of the war between the Myanmar soldiers and the jungle bandits. The bandits kidnap some of the students for ransom. Not willing to pay for the demanded ransom, the group gets the help from Myanmar soldiers who fight the bandits and win their friends. Finally, they can safely return to the Thai border.