Behind the lies, the fitness instructor's story begins with 1 and ends with 12. The fitness instructor in the play is Xu. Xu originally came out to work hard with his girlfriend Meng Yao. Meng Yao also wanted to be a model, but later she lost herself. With the help of Liu Yanping, the boss of the film and television company, Xu successfully made his debut as a big star.

In the play, Xu has an awkward relationship with his girlfriend Meng Yao. They were originally in love, but in their desire, Meng Yao lost herself. She became a model in an improper way, and later had an improper relationship with the director.

In this way, she got out of hand and finally had an emotional entanglement with a father and son. Xu also drifted away from his girlfriend because of her desire, and finally Meng Yao went crazy. Liu Yanping is a rich woman. Later, with your help, Xu became a star.

Liu Yanping is actually the wife of Liu Zhiwei, the boss of Mengyao. When Liu Yanping found out that Mengyao had emotional entanglements with her husband Liu Zhiwei and son Jiejie, he drove Mengyao away, and Liu Zhiwei and Jiejie also left Mengyao.