High school teacher Yeonsang lives with Joo-hee, a student and nephew from the same school. One day, Soobin, a student at the school, comes to say that Joo-hee may be involved in the death of her friend, who sadly passed away not long ago. Yeonsang, who is trying to get to the bottom of the case, is getting tired, but she cannot let go like this.
High school teacher Yeonsang lives with Joo-hee, a student and nephew from the same school. One day, Soobin, a student at the school, comes to say that Joo-hee may be involved in the death of her friend, who sadly passed away not long ago. Yeonsang, who is trying to get to the bottom of the case, is getting tired, but she cannot let go like this.