Trust. It’s just a word, but it’s what got me into this mess. I told myself that I wouldn’t trust another human being and then I met him… Now look where it got me.

Jiyeong is an orphan who is searching for her lost older brother. She decides to disguise herself as a boy and attend Taejong Boys High School in order to find him. When Jiyeong's best friend Jungkook persuades her to live at the House of Secrets, little does she know that her brother is closer than she would've thought. Also, she would've never expected to make such an impact on the lives of the boys there.