Secret Service of the Imperial Court

Secret Service of the Imperial Court, also known as Police Pool of Blood, is a 1984 Hong Kong wuxia film produced by the Shaw Brothers Studio and starring Bryan Leung. The film is strikingly similar in style and plot to, and is suggested to have been remade as, the 2010 filmBlades, which starred Donnie Yen.

The force works under a childish, womanizing Emperor who is irresponsible to his duties. The blood thirsty Eunuch Wang Zhen usually bribes the Emperor with woman and the Emperor gives his powers to the eunuch. Zhao Bu Fa has never been fond of the eunch. Eunuch Wang then orders The Brocade Guards to kill two righteous guards Yu Hua Long and Li Yi. Zhao refuses to kill them and resigns from the force. The furious eunuch then orders Zhao Wu Yi to kill his son he sends his men to kill him but his troupe are no match for Zhao. And so, Zhao survives every time.Zhao then goes into hiding with his wife Xue Liang and son Ding Dong in his ancestral village. His whole clan are there and his uncle Zhao Wu Ji is their leader. Things work out fine, until a message is sent to the village ordering the clan to Kill Zhao Bu Fa or they will be executed. They decide to kill Zhao, where Zhao and his uncle engage in a duel and he kills his own uncle. Zhaos sister Wu Xiao Nan, who did not want to kill Zhao later gives Zhao a poisoned cup of tea they engage in a fight where Zhao kills Wu, and he and his family escape. ........

Source: Wikipedia