Minyoung is a shy high school girl suffering from depression and bulimia. She is mercilessly bullied by her classmates, especially the sadistic Taeyong and his posse. One day, she is rescued by a sympathetic classmate who introduces her to transhumanism, a process where electrical shocks to the brain cause a person to "wake up to reality" through electrical baptism. Now, fully empowered, she plans revenge for the boys that have brutally bullied her. But when Taeyong turns up murdered, Minyoung must travel back in time using the Tesla coil to reveal the killer... even if the killer might be herself.
When the police refuse to investigate their daughter’s alleged suicide, two computer-illiterate parents decide to design a protest banner. Based on the infamous Miryang case in South Korea which shocked the nation in 2004 and continues to fuel public outrage even today.
Aspiring filmmaker Hyunsu offers Miju a role, and they fall in love. As time passes, Miju grows tired of his dreaming while she struggles at work. A fight leads them to experience different July 7ths, leaving their future uncertain.
Geon-woo used to be a promising taekwondo athlete, but quit after kicking an unfair judge in the face. On his first day at Deoksang High, he gets involved in a fight with the school bullies, but defeats them and becomes the subject of school gossip. While Geon-woo was previously tired with everything in his life, he slowly finds interest after his fight with the bullies. In the end, he takes over the school by defeating Deok-soo, the school's best fighter. However, Sang-goo, the best fighter of Dae Jin High, asks him for a bribe, but Geon-woo declines him. Sang-goo is not happy and wants to break Geon-woo.
Ji-hun often tastes blood because of his unusually sharp canines. He lives with his obsessively caring mother and often thinks of his close friend Ju-seong.
Jun, who passed away in an accident a year ago, comes to Earth as a ghost to say goodbye to his lover, Hyun.
The film is structured into three episodes: "Goblin Frequency," "Electric Brain," and "Life Water." The protagonists of each episode face harrowing experiences: a fisherman loses his life to the pond's ominous aura, a Bitcoin miner loses his mother by following computer instructions, and a person experiences bizarre physical changes after drinking the pond water.
Dong-ho is ranked number 1 in "Arena," an illegal gambling league for teens, but he steps down to prepare for college. However, the members of "Arena" don't want to lose their biggest money-maker, so they place a debt on his brother Dong-min. Dong-min literally fights against his debt, but when he gets hurt, Dong-ho decides to fight back.
'Geon-woo', brutally trampled by Daejinbuk High's best 'Sang-goo', vows revenge as he practices martial arts. After hearing about 'Geon-woo's comeback, 'Sang-goo' immediately starts to threaten and ask for bribes. To stop 'Sang-goo', they fight head-to-head. To determine who is the real 'best', the bloody fight begins!
Myeongjoon and Jeongho, high school students in Hwacheon, are old friends with different personalities. One day, Jeongho brings a new bike and Myeongjoon suspects him of dishonesty. The bike owner appears, but Jeongho has no intention of accepting Myeongjoon’s advice to return it. The shadow of catastrophe becomes clear in vague emotions.
Before the concert rehearsal, while Seong-hyeon is tuning his drums, another drummer, Won-tae, appears in front of him and changes the tuning without his permission, and Seong-hyun begins to feel increasingly anxious.