Cha Seung-hyo (Ruthless corporate raider) | actor Yoon Kye-sang
The Korean branch manager of Bluestone, a successful American hedge fund. He uses financial instruments to make investments in all kinds of commodities, equities, hard assets and so on but he's mostly known as an M&A specialist.
He was abandoned by his parents and grew up in an orphanage until he was adopted at the age of seven. He has an IQ score that exceeds 150! That is mainly why his foster parents adopted him.
He is a legal U.S. citizen and also thinks like an American. After returning to Korea to take on a new assignment, he gets involved in a car crash...
After his accident, he begins to act strange?!
Unbelievably, he begins to see ghosts!
He doesn't want to believe what the ghost is telling him... The ghost is the father of the girl he loves and it's been entering his body without his permission!

Sohn Young-in (aspiring comic artist) | actress Ara
Recently graduated from high school. Though she gained admittance to Sejong University where she was planning to major in animation art, the sudden death of her dad forced her to forgo college.
During the day, she works as a waitress at a barbecue pork restaurant and at night she works at a convenience store to make a living. In her personal web blog, she writes down everything that happens in her life and draws her own online cartoon strip for everyone to see. She can't afford college and so she decides to enter a drawing contest to pursue her dreams. Drawing cartoons in her spare time is the only joy in her life. It holds all her hopes and it's the reason why she wakes up every morning to keep living.
She’s eccentric. Aloof. It's hard to nail down what kind of temperament she has. She's like a thriller movie with a surprise ending. She has a thorny personality that is somewhat lovable and her smile is like the sun shining on a warm spring day!
After her mom died, it was just Young-in and her dad. After her dad died in a motorcycle accident, a total stranger appears in her life and behaves like her dad?!
Cha Seung-hyo, who appears in her life, is mean and sweet in a very odd way...

Sohn Il-gun (Daddy ghost) | actor Kang Nam-gil
He was a hardworking motorcycle messenger who died before his time was up due to a motorcycle collision. That is how he became a ghost. Before he crosses the river of no return, he is allowed to roam the human world for 49 days! He has something he must tell his daughter within 49 days. He puts heaven on hold as he haunts the human world, trying to communicate with his daughter!
Foolish and awkward, he cannot hold himself together. He constantly stumbles and makes mistakes.
“I am told that I'm dead! My daughter isn't crying at all! It seems that she's mad at the police for saying that I committed suicide! I didn't commit suicide! I'm a foolish father but I wouldn't deliberately kill myself and leave my 19-year-old daughter all alone in this world! I need to talk to my daughter. I need to tell her all the things I never got to say to her! I'll make any kind of sacrifices to meet my daughter again!”