A secret royal inspector works as an undercover official who inspects local provinces to expose corruption. He teams up with a lady who is searching for happiness by getting divorced with her current husband. The duo then go on a grand scheme to discover the truth and find corruptions.

Ga-young, a filmmaker, visits Seong-bum, an art instructor, to consult on her affair with a married man. The two were once lovers of each other, though that does not stop Seong-bum from becoming a love counselor for Ga-young. Yet, they don′t just consult, but begin exploring new feelings for each other.

The story of a man named Yook Dong-sik who coincidentally witnesses a murder and picks up the killer's diary. While fleeing the scene, he gets into a car accident causes him to lose his memory. Due to the diary in his possession, he mistakenly believes that he is a psychopathic serial killer.

Nan Hee is an ugly girl and this has influenced her to become mean. One day, she receives a ring which holds a family secret. Se Gun is handsome, but he has a cold-blooded personality. Due to the magic of the ring, he declares Nan Hee as his ideal woman with a beautiful appearance.

Four high school friends maintain their ties but finds themselves in very different situations when they reach 21. Chu-won was a promising athlete but, drinking heavily and unable to get past an old flame, he ruins his prospects. Goo-rim became on idol singer, but a drug scandal has seen him fall on hard times. Seo-won, as a medical student at a top university, was faring best among them, until he is diagnosed with leukemia and falls for a teenage escort from their old high school. Meanwhile, Dae-sung is a sex addict with a penchant for mature women who dreams of making his own film.

This is a romantic mystery drama that will depict a murder and a romance story taking place in a luxury hotel. Nam Sang Hyo is the manager for the wedding department of a hotel. She is a perfectionist with a bright personality. She meets her ex-husband Koo Hae Young as a client at the hotel. Sang Hyo and Hae Young were in love and married 7 years ago, but they divorced less than 100 days later. A murder case in the hotel gets in the way of the wedding and throws the characters into unexpected situations. Meanwhile, Jo Sung Gyum is the management director of the hotel and Sang Hyo’s boss. The murder case that brings about a crisis at the hotel is related with his personal history. He is in a love triangle with Sang Hyo and Eun Joo. Eun Joo works as public relations manager for the hotel. She is ambitious with her work career .