Civil engineer Mehmet finally discovers a clue about the sister he was separated from in childhood: the high school she attended. Determined to find her, Mehmet decides to infiltrate the school by assuming the identity of Selim, the physical education teacher. However, Mehmet knows nothing about sports, and things take a turn when he's tasked with building a volleyball team from scratch. Now, he must not only figure out which of the girls is his sister, but also prepare the team for the championship—all while dodging the complications that come with impersonating Selim.