His younger brother Du Jiahao (Han Dong) was killed by a water monkey in Shangshui Town. In order to find out the truth, Qing Ling (Wang Zhener), a female forensic doctor of the Republic of China, had to go to Shangshui Town to investigate. In the remote, deserted and mysterious village, the "curse" of the water monkey's revenge was verified one after another. The brave and resolute Qing Ling bravely carried a gun and bravely entered the forbidden area of the water monster - the Black Wood Forest, and all the cause and effect seemed to have been destined...