Hari Jeon is a high school student with a heart condition. One day, she is struck by a curse that causes her to zap everything and everyone around her whenever her heart races for Jeong-won, her secret crush. Yura Baek, a brash and sharp-tongued classmate who mysteriously knows about her curse, offers her a deal—he’ll help her keep it under control if she lets him use it. Can Hari find the courage to confess her feelings to her crush? Or will she stay in the safe zone of friendship? Get ready for Hari’s electrifying first love story!