The psycho of the martial world — and I became his personal maid. “I,” an ordinary office worker, wake up one day as Shin Seol-ha, a maidservant inside a martial arts novel. To support the grandmother who raised her all alone, Seol-ha enters the Demonic Sect’s service and endures a five-year contract. With only two months left before she can finally leave the sect, everything falls apart — she is reassigned as the personal maid to Jeok I-geon, a man infamous for his cruelty and ruthlessness. Quietly enduring each day just to survive, Seol-ha one day discovers — through I-geon of all people — a martial talent she never knew she possessed. As if that weren’t enough, she suddenly finds herself drawing the attention of the Heavenly Demon and the entire sect. Before long, the Heavenly Demon himself offers to take her as his disciple… “Why is everyone suddenly looking at me?!” Seol-ha desperately wants to escape the sect. Jeok I-geon refuses to let her go. As the two become more and more entangled, one question remains — Where does this relationship end?