Cardiac surgery is one of the most demanding and difficult forms of surgery, and it's not as lucrative as other medical careers, so when Lee Eun Seung and Nam Hye Suk are the only applicants to apply for a residency, they are accepted easily. Dr. Choi Kang Gook, the new head of Cardiovascular Surgery, has his doubts. Eun Seung has always dreamed of becoming a great cardiac specialist, but as an orphan coming from a small-town medical school, his skills are basic. Hye Suk, on the other hand, graduated from an elite medical school with top marks, but possesses an inflexible personality. Gradually, as they work together, a mutual respect dawns, and Eun Seung begins to be attracted to Hye Suk. But things get complicated when famous actor Lee Dong Gwon is admitted to the hospital, who has a romantic past with Hye Suk and aims to win her heart once more.

A woman gets killed in a department store. No one imagines this could lead to serial murders, but two days after the first murder, another homicide occurs. A woman is suffocated to death and the only evidence left at the crime scene is a sticker of the cartoon character “Princess Aurora”.

His life in shambles after youthful dreams of becoming a golf champion yield disappointing results, bored stock exchange worker Seungwan receives a second chance at success after a freak accident puts his life back on track. Severely beaten after inexplicably angering local mob boss Ma Gangseong, Seungwan passes out after meeting a man who appears to be his clone. Upon regaining consciousness, Seungwan learns that the life he knew is no more; he is no longer a miserable failure, but a famous golf champion. Though his marriage had been heading down a rocky road for some time, his new found success and passion finds him and his wife Jiyeong falling back in love. Though everything suddenly seems to be falling into place for Seungwan, an upcoming golf championship threatens to unravel his ideal world unless he is able to pull it all together for one shot at a life of happiness.

Tae-joo manages to rise in rank in a gang for saving the boss's life. However, prosecutor Dong-pal appears in front of him as his sworn enemy. Meanwhile, Jo-pil wants to get rid of Tae-joo's gang, training for revenge. The three men's goals intertwine.