Joo Hong Bin has anger management issues, and relies on his faithful secretary to keep him in line. Se Dong is a game developer who finds that her company has been sold to Hong Bin without her knowledge.

Se Dong becomes Chang's temporary caretaker, while dealing with the aftermath of her colleagues' reckless actions that land them in jail.

Chang has a hard time adjusting to Hong Bin's home. Se Dong continues searching for jobs for herself and her entire team.

Hong Bin begins having vague memories of what happens before he faints. When Chang goes searching for his grandfather, Hong Bin ends up on a journey back to his first love's hometown.

Se Dong makes use of her time in Tae Hee's hometown by helping everyone out as best as she can since she's been forced to go there. Hong Bin tries to find out where Tae Hee is from her parents.

Fully aware of the blades that come out of his back, Hong Bin tries to get to the root of his condition and find out when he became this 'monster'.

Now understanding how his powers work, Hong Bin tests his limits while trying to stay away from his father, who is trying to get closer to Chang in an effort to make up for his mistakes in the past.

Se Dong is awkward around Hong Bin after confessing her feelings for him, but it makes him incredibly happy. Hong Joo's failing grades make him a target of his father's insults, and pushes him over the edge.

Hong Bin does whatever he can to win Se Dong back and get her to agree to date him, despite their working relationship. Hong Joo finally stands up to his father.

Hong Bin's secret is slowly revealed to more people, and it becomes even more imperative that he learn to control his powers, with Secretary Ko's help.

Though Se Dong has seen Hong Bin's powers in action, she pretends she doesn't see anything to prevent further embarrassment between the two of them. Hong Bin grows closer to his son Chang.

Hong Bin grows closer to Chang and makes amends with his father, but Se Dong grows distant when she learns the sad truth behind her father's death.

Hong Bin is is worried about not being good enough for or even worse possibly hurting Se Dong.

The truth about Tae Hee comes out, leaving Se Dong in a very conflicted position.

Hong Bin finally meets Tae Hee face to face and tries to get to the bottom of why she left.

Tae Hee and Se Dong grow closer even though they are both in love with the same man. Hong Bin blames his father for Ja Kyung's disappearance.

Hong Bin decides to go and see Tae Hee to take care of her despite his longing feelings for Se Dong.

Hong Bin's strange personal journey comes to an end.