In Laos, 1954, eight days before the french defeat in the Indochina war, the 317th platoon – four french soldiers and 41 laotian combatants – has been ordered to leave its outpost and to retreat for the plains of Diên Biên Phu, where the french army is getting stucked. Led by the inexperienced and idealistic sous-lieutenant Torrens, fresh out of the military academy, and by adjutant Willsdorf, a WWII veteran of the Werhmacht, the group must cross 150 kilometers of jungle. But dripping rainwater, hostile nature, and the Viêt-minh ambushes expose them to constant danger.

故事发生在一座地处偏远的小村庄中，一名经常受到丈夫虐待的女子在深山之中邂逅了蛇王，在和蛇王发生了关系之后，她怀孕了。丈夫发现了妻子的不忠，愤怒的他杀死了蛇王和妻子，也杀死了妻子腹中怀着的数百条小蛇。其中，只有一条小蛇逃过了一劫，他被山中的善良隐士收留，渐渐长大。 一晃眼多年过去，小蛇化身成为了名为威斯纳（Chea Yuthorn 饰）的英俊青年，一次偶然中，他邂逅了名为索尼娅（李莎月 Dy Saveth 饰）的美丽女孩，两人之间产生了真挚的感情。哪知道，这段感情遭到了索尼娅继母的妒忌，后者也深深的爱上了威斯纳。为了拆散这对爱侣，继母不择手段，并且最终得知了威斯纳的真实身份。