Jiyoung's maternal grandfather had informed her about the Trumps and the Rule that governs them. At her new school, Jiyoung witnesses a supermodel use a unique power in a fight against a boy that resembles what her grandfather had described. She is unwittingly dragged into their battles and encounters them at school. Jiyoung finds out that they are psychics known as Trumps or Cards, possessing exceptional abilities. As she befriends them, she discovers her own extraordinary power, prompting the question: is she also a Trump or the Rule?