The first year of Hae-yi’s Yonhee University life begins. On her first day, she runs into Jung-woo and hears about Theia. However, Theia is currently a squad that is about to go under due to a lack of members. Young-woong believes Hae-yi is the only person who can save the squad and tries to persuade her by offering what she needs most.

At the beginning of a new year, Yonhee and Hokyung compete in the joint pep rally. Whereas Hokyung has a powerful team, Theia lacks the minimum number of members. Therefore, Jung-woo decides to choose two freshmen to perform with the squad. Through a physical test, Hae-yi and Sun-ho get chosen. To prepare for the rally, the fiercest training awaits the two.

The squad is busy getting ready for the joint pep rally. Jung-woo asks Hae-yi to overwork herself, and this leads the two on bad terms. Meanwhile, Sun-ho asks Hae-yi out once again, but she makes it clear this time that she is not interested. She hates Jung-woo for pushing her, but she feels something about him deep inside her heart.

Hae-yi becomes sad for a bit to know that Jung-woo has a girlfriend. However, she then learns from Sun-ja that the two captains have already broken up months ago. With that in mind, Hae-yi steps up to the stage to perform the Joint Pep Rally. But she does not know what kind of trouble awaits her on stage.

Although the joint pep rally is successful, Hae-yi could have been hurt badly if it wasn’t for Ha-jin and Sun-ho. Certain that this is not just an accident, Jung-woo digs in to find who is behind it. Theia goes on a field trip. The trip that should be filled with laughter and joy does not last that long. Someone is targeting Theia with bad intentions.