The Hidden Heart

Jeon Jungkook is a man of logic, cold calculations, and sharp suits. But his perfectly ordered life is thrown into chaos by two people: the "broken" heir he's been hired to protect, and the anonymous "Ghost" who keeps teasing his private phone with riddles.

As the digital game of cat-and-mouse pulls him through the streets of Seoul, the stoic executive starts to realize that the boy in the shadows might be the most dangerous player of all.

He thinks he's the one standing guard. He doesn't realize he's already been caught.