Rules of Lips and Tongue

In order to find his mysteriously missing sister, racer Han Zai Yu goes to a famous nightclub called J Club. But rather, he found out the dark industry hidden in the normal business of the nightclub, is a "banquet of ladies" serving the upper class, and he bumps into a mysterious man, Liu Yuan, who disguises himself as a woman and seems to be both good and evil. Can the two find out the hidden secrets of the nightclub? Who controls all this behind the scenes?