While under heavily armed guard, the dangerous convicts aboard a cargo ship unite in a coordinated escape attempt that soon escalates into a bloody, all-out riot. But as the fugitives continue their brutal campaign of terror, they soon discover that not even the most vicious among them is safe from the horror they unknowingly unleashed from the darkness below deck.
Young-ho doesn't have any dreams for his life. He has been studying for three years to enter a university. He decides to send a letter to his childhood friend So-yeon. But her younger sister So-hee receives the letter instead of her sick sister. So-hee writes back to Young-ho, pretending to be So-yeon. Meanwhile, So-hee takes care of her sick sister and also runs a secondhand bookstore with her mother.
Lee Hyeong is a talented songwriter. He happens to connect people who are not good with love. Those include Hyeong-Gyeong who wants to become a singer, but she suffers from stage fright. Scully is a high school student. She helps Lee Hyeong's spirit. Chan-Young is a colleague of Lee Hyeong and he likes Hyeong-Gyeong, but in vain.
High school student Jung-Won (Cha Ye-Ryeon]) works at an amusement park, dressed up as Dragon cartoon character. Then one day, a guy, standing among his friends, twists her dragon mask around, causing her to fall flat on her back. Shortly afterwards, she spots the guy that caused her to fall down. Jung-won proceeds to pour a drink over his head. A few days later Jung-Won is horsing around with her brother on the top floor of their home. They notice that a new family moved in next door. Jung-Won then gets a sickening feeling when she realizes that the young guy in their family is the same guy that twisted her dragon mask around in the amusement park. His name is Eun-Kyu (Jang Keun-Suk), a popular high school student that fronts the band “Doremifasolasido.”
A young writer can't write a word for his next novel, he also doesn't feel right with his fiancée; because he falls in love with a woman, but he can't remember who she is and can't figure out if she's real or just a dream.
