A married woman who falls in love with another man, and the young man who tries to seduce her?? as well as the people who chase after them. December Fever is the story of a dangerous love affair between a married woman and a dying man. It introduces us to people with double standards and other falsehoods, as well as people who sacrifice themselves for family. In addition, it??s a story of a father and his dying son as well as a tale about the conflicts between and their mothers-in-law. It holds a mirror to everyday life with comic and interesting characters.

Heo Myung Pil is an elite newspaper reporter but an immature and irresponsible husband. Gyung Gook Hee is a bright and valiant wife.

Along with the two, Lim Tae Ran is a successful scenario writer who possesses both fortune and fame, she is considered an ideal female figure in today's society, and the college student, Seok Doo, who receives the love of many wives.

James O'Neil is a 28 year old man who was adopted by people overseas when he was young. He is the CEO of a very large supermarket and is the typical man with cool charm and deals with things in a cool and collected manner. Lee Jin Hee is 32 years old and her husband suffered a horrible accident on the 6th month they were married. She takes care of their son for seven years and is faced with bankruptcy. Jin Hee meets James and they do business together and soon they develop a romantic love story.

Before the marriage to fiance, a young lady Kim suddenly suffered a heart attack. She was moved to her father's hospital, but her father Dr. Kim was not able to save her. So he took her body and froze her until he could find a way to save her.

And 25 years later, in 2005, she is revided. But she cannot remember her fiance... and she falls in love with his son...

More than a thousand years ago from the present time, Puyeoju is the Baek Jae Empire's princess. Unlike other princesses, she is active and skilled in the arts and in sports. When the Baek Jae Empire crumbles due to a spy, Kum-hwa, she runs away with her bodyguard General Guishil Ari and falls in love with him in the meanwhile. The new conquerer Kim Yu-suk is also in love with the princess, but only receives hate in return. In a desperate attempt to win her, he kills Ari, but the princess runs away and jumps off a cliff to kill herself. While falling, she travels more than one thousand years into the future, which is our present time of 2003. Only she remains to be who she was, and she encounters Ari to be an aimless fashion designer Kang In-chul with a warm heart and bad temper. Although he is annoyed at her ignorance of the present world, he comes to fall in love with the princess again. Fujiwara Tatsuji is the son of the Fujiwara dynasty, and once again is mysteriously attracted to the princess. Only she knows the past that holds all three of them together, but will things become an exact replica of the situation back then?