1941. Chumphon Province, Thailand. Mok and his ragtag unit of young soldiers are thrown against the invading Japanese forces. The invaders bring with them a terrifying biological weapon, unaware that it has plans of its own.

World War II in Chumphon. Mek, a new sergeant, and Mok, his younger brother in the Youth Soldier unit, face a mysterious threat when "something" belonging to the Japanese goes missing during their landing. This leads Mok and his fellow youth soldiers to encounter horrors far worse than war. Even after Thailand and Japan declare a ceasefire, Mek receives a special covert mission to clean up the area alongside a Japanese combat unit, unaware that this might include his own brother.—exe_malaga93