From World War, to revolution and ultimately rebirth, Forever Young is the story of four generations spanning a hundred years of modern Chinese history. Each generation faces its own unique set of challenges. Up against corporate corruption, the trials and tribulations of the cultural revolution, and one's duty to nation in time of war, they are faced with choosing their individual paths through history. But as the challenges and turmoil of each generation may differ as time changes, what was learned in the past cannot help but effect the choices that are made in the future as it is passed down from generation to generation. And that is the universal message that being true to yourself is precious. It is the source of strength that empowers one to become the person they want to be, to march forward as far as their hearts desire, into the future.

Yin Thirteen and Fatty Shi are good friends, and they hang out at the Maoshan bar. Yin Thirteen is pro demon catcher but nobody believes him. One day friends are invited to a woman's house where the curtains are hung tight because as soon as she opens them she feels someone strangling her. After they manage to solve this one, they are drawn into another incident. A week ago, a girl from the same school, Mu Ran, was in a car accident and her friend Lan Shan died in the accident. Her ghost seems to be full of resentment and want to drag her friends into the underworld. Thirteen and Fatty save Mu Ran, but on the way back, they encounter the young men from Fatty's village, Dai Xiong and Xiao Xiong. It was a bad feeling. In order to find out, the good brothers and Mu Ran headed towards the village where the evil spirits were roaming....

Northern China, 2004. When miner Zhang Baomin returns to his home, a small and isolated mining village, his wife tells him that their son has mysteriously disappeared while shepherding his small flock.

In a small-town high school, days before the college entrance exam, teacher Chen Jun finds out that the father of his most promising student has died in a mining accident. Telling him—or not—bears heavy consequences.