Im Yoon Ah is dubbed as a "Joyonghan" or "Silent Girl" in her school. Probably because she doesn't talk to people nor approach them. She only has one friend but she only communicates with her by writing on pieces of paper. She wasn't born mute, in fact, she used to be an out-going and bubbly kind of a girl. Something happened in her past that made her loose the ability to talk.

Xi Luhan is the new hottie that transferred in their school. He is the total opposite of Yoona. He is talkative and popular. Every girl adores him and every guy idolises him. He bumped into Yoona one day on his way to school not knowing that she goes to the same school as him. When he found out, he finds this "silent girl" to be interesting. He doesn't know why, but he wants to break her free from her "silent" sanctuary. He tries to befriend Yoona but she just ignored him. Despite this, Luhan tries everyday to let himself in on Yoona's life. The more he tries, the more they become closer.

Will Luhan be able to break Yoona's silence?

Will Yoona be able to communicate what her heart feels towards Luhan?