In the first 18 episode, Bai Yan was fired for losing a bag of rich female students in the gym, and everyone had no choice but to open the closet to prove their innocence. As a result, Bai Yan lost his key and couldn't open it. Jack pried open her closet to prove Bai Yan's innocence. As soon as she opened it, she found the bag in Bai Yan's closet, and the rich woman made a hullabaloo about calling the police. The gym owner appeased and eventually fired Bai Yan to calm the incident.

Actually, Bai Yan didn't steal the bag, someone else did.