Hee-soo is desperate for money and finds her ex-boyfriend who owes her money. He goes around to various ex-girlfriends to get cash and she trails along to make sure he does not cheat her.

Kwon returns to Seoul from a restorative stay in the mountains. She is given a packet of letters left by Mori, who has come back from Japan to propose to her. Kwon drops and scatters the letters, all of which are undated. When she reads them, she has to make sense of the chronology.

Jeong-eun is embarrassed that her mother, who is suffering from dementia, wants to meet and call her sister from who was separated with due to the Korean War. However, Jeongeun accidentally receives a wrong call from a North Korean woman and is asked a favor.

An idle part-time college lecturer is annoyed by the yapping sound of a nearby dog. He decides to take drastic action.

A comic book store in Garibong-dong is run by a beautiful woman better known as Madam. This store stays open late into the night, thus attracting varied types of people such as gangsters and hustlers.

Seok-jin, a magician at a club, meets a mysterious woman, Ha-yeon, who soon becomes his assistant and fiance. Things take a turn when she is found dead and he must find out what happened.

Activist Kim Min-soo is a fugitive from the law as a result of his political campaigns. As he goes into hiding, he meets and falls in love with Lee Sun-young, a music graduate with plans to study abroad. But not long after, they begin to face obstacles. Because of Min-soo's fugitive status, Sun-young has to cancel her plans to study abroad in order to protect Min-soo. Eventually, the couple elope and Sun-young becomes pregnant, but eventually, the police finds Min-soo and arrests him.

Min-Soo is a playboy who can't tolerate long term relationships. However, fate takes him to beautiful Hye-Won. While, Min-Soo becomes totally captivated by Hye-Won, Hye-Woon tries to resist Min-Soo, fearing their love will be shortened by her terminal illness.

A working class family move into a new condo purchased after 11 years of hard work. They throw a housewarming party to show his co-workers when overnight a heavy downpour creates an extremely deep sinkhole that engulfs the entire building.

An aspiring singer Sun-deok is visited by her mother, whom she hasn’t spoken to in years. The abrupt encounter leads to the news of her younger sister Yuri, who had vanished with their savings. The mother-daughter team is now hunting for the missing girl and their money, poking around in Itaewon, the international hub of Seoul. Little do they know that soon they will be faced with Yuri’s unlikely secrets.

After 14 years in Japan, a gangster returns to the Seoul neighborhood where he grew up and is forced to confront some difficult truths.

Red Room was the first concert tour headlined by South Korean girl group Red Velvet, in support of their first special extended play The Red Summer (2017). A physical-media package was released on July 12, 2018 containing a 168-minute performance in Seoul on August 20, 2017, including rehearsal footage, backstage content, member interviews, and unreleased photos.