Kim Soo-hyun is a mother whose young daughter Han Saet-byul gets kidnapped and murdered. Discovering a miraculous ability to go back in time exactly two weeks before the event, Soo-hyun is determined to expose the kidnapping plot and save her daughter before she dies all over again. Helping her is Ki Dong-chan, a former cop turned private investigator out to prove the innocence of his mentally challenged brother, who is falsely accused of murdering Dong-chan's ex-girlfriend. As Soo-hyun and Dong-chan race against the clock in the allotted 14 days, new light is shed on the crimes, and they uncover secrets far more treacherous than Soo-hyun could have ever imagined.[1]
He was once an outstanding police officer, who left the force after a certain incident. Now a private investigator, Dong-chan has a personal connection to the case and helps Soo-hyun when she goes back in time.
He is a human rights lawyer who is passionate about his work and is a loving husband to Soo-hyun and devoted father to Saet-byul. But he is also harboring a secret.
A detective in the violent crimes division, he graduated the police academy at the top of his class and is already known as future police commissioner material. He is Soo-hyun's first love, and she suddenly comes to him out of nowhere and begs him to find the suspect who will kill her daughter in two weeks' time. Initially disbelieving, he gets sucked into the case and puts his career on the line to help her.
Soo-hyun and Ji-hoon's daughter. Saet-byul is quirky and cute, though a bit of an outsider at school. She doesn't get good grades, but is warm and kind despite the fact that the other kids leave her out and call her the weird kid. Her one friend is Young-gyu.
A developmentally disabled teenage boy with the mental age of a six-year-old. He is Saet-byul's friend, and tries to save her from the kidnapper.[6][7][8]
She started out as a con artist who'd already been to jail five times, until Dong-chan hired her as a fraud detection expert.[8]
Supporting characters
Park Hye-sook as Jang Mi-soon
Soo-hyun's mother.
Kim Jin-hee as Joo Min-ah
Soo-hyun's junior colleague who had an affair with Ji-hoon. She became pregnant with his child, but miscarried when she fell down the stairs while Ji-hoon was forcing her to go to an abortion clinic.
After witnessing his beloved older brother's suicide, he went into a long period of depression. He decides to fulfill his brother's lifelong dream of becoming a musician in his place, and successfully becomes the front man of the rock band Snake. He is Saet-byul's favorite idol singer. However, unforeseen events threaten to quash his dreams altogether when the shoe of a missing child is discovered in his van. Although he isn't prosecuted as a criminal, he is still considered as a possible suspect in the case.
