Il-han Yoo
Min-young moves onto the fifth floor of a new studio apartment with her six-year-old daughter, Joo-hee. She’s concerned when her downstairs neighbor, Han Chang-soo, says that he cannot tolerate the noise above him, even though the two women live tranquilly. Furthermore, she is anxious about other residents’ strange behavior, never mind the mysterious deaths. Min-young hardens herself mentally after the move into the new house, largely because of her daughter’s unprecedented odd behavior and continual run-ins with a bizarre woman. Convinced that Joo-hee has fallen sick and perturbed by the mysterious events around the studio apartment, Min-young looks to uncover the truth by herself…
Ji-yeon, a tollgate ticket girl, is frightened by a mysterious black car, which pays a bloodstained ticket fee at midnight. Her fear deepens after her colleague, Jong-sook, tells her that 12 years earlier a prisoner transport vehicle caused a traffic accident wherein all the prisoners involved died – and some of the corpses disappeared. Afterwards, a murder occurred near the tollgate on February 29th every four years. Soon, odd events become increasingly frequent, usually involving a doppelganger of Ji-yeon. When Jong-sook is killed on the fateful February 29th, Ji-yeon – with the help of two detectives – starts looking into matters herself.
Roommates Yoo-jin, Eun-soo, Bo-ram, and Da-young are cramming for a college entrance exam. It's difficult for them to adapt to the stifling atmosphere of the women's lodging institute - and to get along with each other due to their differing personalities. Yoo-jin has the most difficulty with the stuffy institute life. she begins to have visions of events that took place at the institute in the past - like the tragic fire that occurred years ago. Yoo-jin gradually becomes consumed with fear, and the relationship among the four intimate friends begins to suffer.
