During the reign of King Sejong in the 15th century, the Joseon Dynasty was the embodiment of the perfect state. To the Ming China, the aspiring imperial power, Joseon presented an obstacle to territorial expansion. To protect themselves from war, King Sejong develops a secret weapon to defend their territory and take back their land and supremacy.

After his parents are murdered, Bin is taken into the care of relatives. He begins to act strangely, the new occupants of his house experience horrific nightmares, and a mystery unfolds as a terrible secret is revealed.

Hun is a famous Casanova who works as a part-time valet parker at a bar. He suffers from a huge amount of credit card debt, since he has spent money on his girls. Meanwhile, Hun's usurer hires Joong-tae to threaten Hun for getting his money back. One day, Hun and Joong-tae witness a murder scene, and they fall into the real trouble.

Ja-young lost her husband 3 years ago. One day, Dong-ha appears in front of Ja-young and her daughter Yoo-jin. Ja-young falls in love with Dong-ha who is tender. She begins to dream of happy life with Dong-ha. Meanwhile, Yoo-jin feels lonely since her mother is always busy with work. She begins to have feelings for Dong-ha.

Chulsoo is a punk kid who always plays tricks on others. One day, while he is picking on somebody as usual, he meets Younghee, a new transfer student, who becomes his class partner. He starts to like her. Younghee is a precocious smart girl who lives with her grandmother alone. Her grandmother owns a flower shop and she helps her grandma by delivering flowers. Though Younghee looks lively, she misses her deceased parents at heart.

A story about a third-rate DJ who finds his relationship with his young son rapidly deteriorating.