Due to family problems, Ahn Eunkyung was forced to leave her school and home in Seoul, to go live with her uncle and cousin all the way in Gimhae. She hasn't seen her cousin in a long time, who she had grown up with, only to find a complete different person when they're finally reunited. Cold, mean, and distant; very different from the outgoing, sweet, and funny boy she grew up with. New school meant new people, but also new friends, but also new enemies, and new mysteries for poor Eunkyung to solve, because that's the only thing she's ever been good at.