After being sold for eight copper coins in the lean years, Chunyi and Azhi formed a life-and-death friendship on the bumpy carriage. In order to survive, Azhi used cruel methods to let the two of them enter the palace instead, and then stepped into the bottomless Forbidden City. Azhi worked step by step from being a palace maid in clothes to being a noble concubine; while Chunyi resembled an old friend of the emperor, and was accidentally named a talented person from an ignorant palace maid. The two sisters supported each other, but gradually became estranged due to the emperor's favor. As Azhi gets deeper and deeper into the conspiracy, Chunyi discovers that behind all the doting and fighting, there seems to be a pair of invisible hands secretly controlling it.
