The heroine appears to be a "soft persimmon" who can be manipulated, but in fact she is the real daughter of a top chaebol who has been missing for many years and the founder of the mysterious hacker organization "Ace of Hearts". The male protagonist appears to be the cold and ascetic boss of Party A, but in fact he is the heroine's childhood savior and the "loyal dog knight" who has been secretly in love with her for ten years.
