Strangers From Hell

Jong-woo goes through disgraceful experiences upon arriving in Seoul. He visits various dorms, but they are all too expensive for Jong-woo to manage… Meanwhile, Soh Jeong-hwa, a police officer, is sent to a scene after receiving a report that a body of a dead cat has been found, and is suspicious of the connection related to a past case.

Jong-woo senses some strange air flowing between the housemates after the appearance of Yoo Ki-hyuk. Jong-woo feels uncomfortable dealing with Yoo Ki-hyuk, the Room 302 tenant who shows excessive interest in him, and is angered at his senior Park Byoung-min's attitude.

Jong-woo meets the man living next door, Suh Moon-Joh, in the roof top and relaxes as he thinks that he and Moon-Joh have a lot of similarities. Meanwhile, Soh Jeong-hwa learns an unexpected fact as she talks with the wife of the missing foreign worker and her suspicions of Room 306 tenant Byun Deok-jong increases.

Feeling uncomfortable at Suh Moon-Joh's weird joke, Jong-woo hurridely leaves while drinking beer together. Jong-woo starts to feel more anxious as the Room 310 tenant Ahn Hee-joong and Room tenant 302 Yoo Ki-hyuk suddenly disappears and room tenant 313 Hong Nam-book threatens Jong-woo with a knife.

Jong-woo finds that his laptop was turned on and thinks that someone has entered his room. As he searches the sercurity camera, he find suspicious activities from Hong Nam-bok, leading him to go find him and questions him harshly. Suh Moon-joh calls Jong-woo separately and gives him advice, but Jong-woo feels a strange of alienation from Suh Moon-jo.

Jong-woo hurridely goes to the Sharehouse with Soh Jeong-hwa after receiving a call that his girlfriend, Min Ji-eun has arrived at the Sharehouse. However, Min Ji-eun feels frustration from Jong-woo's attitude and the situation that stops her. Next morning, Jong-woo hears a weird story from Suh Moon-joh.

Jong-woo meets the new tenant, Seok-yoon, and becomes friends with him in a short amount of time. They go watch buskings together. Jong-woo talks about the strange things that have been happening at the Sharehouse and Seok-yoon believes his words. Meanwhile, Soh Joeng-hwa hears a surprising story from Suh Moon-joh as she visits his dentist.

Jong-woo faces trouble as he assaulted students that he faced conflicts with at the PC room. Suh Moon-joh helps Jong-woo but Jong-woo feels afraid as he thinks that Suh Moon-joh's kindess is imprisoning him.

Jong-woo hurts Min Ji-eun while suffering from hallucinations, and Ji-eun leaves Jong-woo stating that she is afraid of Jong-woo. Lost with no place to go, Jong-woo wawnders around the streets when he hears a shocking news, that his company's CEO Shin Jae-ho has died. Jong-woo, who visited to Jae-ho's funeral, suffers from severe guilt.

Jong-woo arrives at the Sharehouse with his military junior Chang-hyun, who he met unexpectedly. Before going into the Sharehouse, Jong-woo calls Soh Jeong-hwa, and Soh Jeong-hwa hurridely heads toward the Sharehouse to save Jong-woo. Having no place to retreat anymore, Jong-woo begins his final battle with the Sharehouse tenants including Suh Moon-jo. Will Jong-woo make it out alive?