In the summer of 1942, the Burma Highway was under constant artillery fire.
Former Yunnan Army captain Chen Yuanshan received a mysterious commission: to find the tomb of King Xian deep in Ailao Mountain and retrieve the bronze secret box that can "command hundreds of poisons".
The reward was ten gold bars, enough for him to escape from the troubled times.
Aguo, the daughter of Bimo of the Yi ethnic group who was traveling with him, warned him: "There are no worms in the worm valley, but the human heart is the worm."
However, Shen Mobai, an archaeologist who returned from studying abroad, discovered that the geomagnetic anomaly in the valley caused the compass to spin wildly - the key to opening the tomb door was actually the butterfly storm on a full moon night.
