"The Four" revolves around four famous detectives in ancient China. This movie is intended to be the first installment of a trilogy. The recent circulation of counterfeit money has landed the capital of the Song Dynasty in a predicament. The Department Six Constabulary and Divine Constabulary are sent to investigate, but complications arise when the competing constabularies constantly get into each other's way. The Divine Constabulary is eventually suspended but spearheaded by the eponymous The Four. The constabulary continues to work on the case. It soon uncovers a more sinister plot to overthrow the government and must rush against time to stop the perpetrator before he plunges the dynasty into chaos. ~~ Adapted from the novel “Si Da Ming Fu” (四大名捕) by Wan Rui An.