Shi En (施恩), the son of the superintendent of Mengzhou prison, has heard of Wu Song's exploits and hopes he could help him re-take control of Happy Forest (快活林), a bustling cross-roads. In fact most of Shi's "profit" is protection money from businesses and tolls from travelers which he collected through a restaurant at that location. But the restaurant has been snatched from Shi by one Jiang Zhong (蔣忠), a burly wrestler nicknamed "Jiang the Door God". Invited to Mengzhou by his relative militia instructor Zhang (張團練), Jiang beat up Shi En and seized control of Happy Forest. Shi, needing Wu Song‘s help, tells his father to spare him mandatory beating which newly-arrived exiles are subject to and ensures he leads a comfortable life in prison. Wu initially thinks all this is just a run-up to murdering him in prison as he has refused to bribe the officials to escape the beating. Upon knowing the real reason, Wu agrees to help Shi take back the restaurant. But Shi doubts he has recovered his strength after days of ordeal. Wu demonstrates his physical might by lifting with one hand a hefty urn. He also says his fighting ability is at its peak when he is drunk. So he asks to be served three bowls of wine at every inn he comes by on his way to Happy Forest. By the time he reaches the restaurant he has taken an enormous amount of wine. He provokes Jiang Zhong into a fight and soundly beats him with a set of martial arts moves known as "Jade Circle Steps and Mandarin Ducks Kicks" (玉環步，鴛鴦腳). Jiang is ordered to apologise to Shi En, return Happy Forest to him and leave Mengzhou for good.