On the cliff of Langshan Mountain in Hunan, clouds and mist linger all year round. A ridge as narrow as a knife blade leads directly to the incense burner on the top of the cliff. This is the location of the dragon head incense that the Wang family has regarded as a "secret treasure of transportation" for generations. Everyone in the Wang family firmly believed that the leap from farm boy to deputy minister was all due to the burning of incense in this desperate situation every year. Wang Xing, a researcher at the Beijing Academy of Social Sciences, returned to his hometown alone to renew his incense during the National Day, as entrusted by his elderly ancestors. As soon as he arrived in his hometown, he was warmly greeted by Mr. Chen, his old subordinate who had been "taken care of" by his father many times. After three drinks, Mr. Chen arranged for a young woman, Xiaohui, to take care of Wang Xing... The next day, the two climbed Longtou Cliff together - the narrowest part of the ridge is less than three inches, with bottomless abyss on both sides. Wang Xing, who was eager to return, paid a high price of 10,000 yuan to hire tired mountain people to climb the incense on his behalf. But when the incense was burning, a dark wind suddenly rose, and the mountain people's feet slipped and fell into the abyss silently. The frightened Wang Xing, the unpredictable Mr. Chen, and Xiao Hui who has another agenda. A human life farce will eventually tear away the fig leaf that has been used by the Wang family for seventy years in the officialdom. Behind the faint green smoke, there are hidden secrets and sins spanning three generations and insatiable desires.
