In Hogwarts, Lee Seunghoon sells his talents. One of his unfortunate clients is Kim Jinwoo, a very capable Ravenclaw who needs his help, not for him, but for someone else. Another one of Seunghoon's clients, Song Minho, is also looking for a potion he is not willing to create. Nam Taehyun is Seunghoon's best - and only - friend and he knows more than he says but he is also very obvious when it's about the other half of Jinwoo, Kang Seungyoon, who is, at the same time, totally at lost