The second season has a similar focus to the first, dealing with current social issues faced by the youth both at school and beyond, as well as their friendships and concerns.
A college-aged student teacher (played by Hwang Jeong-Eum) is assigned to a high school. Once she arrives murders start occurring in succession ...
Kang Suk Ho is an ordinary lawyer who decides to teach a bunch of rebellious students. He promises to get five of them into their most prestigious college in the country.
Ha Na and Doo Na were twin sisters who were very close to each other until Doo Na died a terrible death. One day, the usually bright and energetic Ha Na finds herself changing. She has superhuman strength and can do things that nobody can. Ha Na realizes that Doo Na's spirit has inhabited her body.