"Vowing to Enter the Mountain of Swords". The background music of Douyin's anti-drug clip is called "Oath to Enter the Mountain of Swords". The plot of the movie "Anti-Drug" tells the story of three people who were originally good brothers. They made different choices in the face of difficulties and temptations, and their destinies were very different from then on. But in the end, the three good brothers worked together and used their lives to fulfill their destiny. mission.