Mal-soon is a tough granny in a shanty town in Busan. In front of her, 12-year-old Gong-ju appears with her baby sister Jin-ju on her back. Gong-ju claims that she is the daughter of Mal-soon’s runaway daughter. Mal-soon’s peaceful life becomes a mess with these little strangers, but Mal-soon doesn’t feel bad living with them.
Yu-jin and her blind mother move to a small village from Seoul. On her first day at the new school, Yu-jin gets picked on by her classmates. Along with other victims of hatred, Yu-jin puts a curse on the four girls tormenting them through a Ouija Board. On her second day at school, one of the spellbound bursts into flames and dies just as she sits down where Yu-jin used the board. Next day, another victim burns to death, and now the school is enclosed by horror.
A serial killer (Woong-in Jeong) whose modus operandi includes painting abstract designs on his victims prior to raping, killing, and eating them is captured and interrogated by a hardened district attorney (Soo-yeon Kang). When the maniac fails to provide answers satisfying both the prosecution and defense attorneys, he is hypnotized and shocking secrets begin to emerge.
Soon after getting a new phone, a woman notices strange things starting to happen. When she investigates, she discovers that everyone who has had her phone number before her has died suddenly and mysteriously.
Ae-Ryun runs a video store called "Sad Movie" on her own. She is a typical Pisces who likes French films and takes an interest in everyone surrounding her. Her best friends are the movies that surround her--and a lonely tropical fish. One day she meets an unusual customer, Dong-Suk, who comes into her store to rent some videos. He loves French movies too. With his beautiful smile, she cannot help her affection towards him.
Hye-jin's homecoming should have been a joyous occasion. She was especially happy to see her childhood friend again, the shy Eun-ju. However, when a secret is revealed, harsh words are exchanged. These words deeply affect Eun-ju and,in the next scene, we see her plummeting from a 30-story building. In a flashback provided by Seon-ae, we learn that the ghost of Eun-ju is hunting down all of Hye-jin's friends and killing them. Is this possible or is a more worldly force at work? What is this mysterious tape that everyone is asking about?