The 17-year-old girl, Woodam, is overjoyed to have her own room for the first time. However, her older brother, Woojoo, brings home the pregnant Gyeongbin, who happens to be Woodam’s classmate. Faced with the threat of losing her room to Gyeongbin and her unborn baby, Woodam begins to devise a grand plan.

A popular YouTuber crew "Killing Time" loses a team member in an unexpected accident during a live broadcast, losing everything. However, they only received a suspended indictment, as benefited from the newly proposed 'New Media Act, which was designed to actively utilise modern media for profits. To make a successful comeback, they devise a plan to return with even more sensational content. However, just as soon as success seems within reach, mysterious people appear and propose the 'real' Killing Time. One by one, team members begin to be murdered... Who are these mysterious people? Will they manage to survive?

Swimming instructor, Young-eun is a single mom raising her 7-year-old daughter, So-hyun. However, a series of tragic events happens as So-hyun's puppy falls from the apartment and dies, and So-hyun bullies other kids in school. Despite her mom's earnest efforts to address So-hyun's mental disorder, her peculiar behavior persists. Twenty years later, Min, who works in handling unclaimed deaths, meets a new colleague, Hae-young, and they form a close bond. However, as Hae-young warmly integrates herself into Min's life, Min begins to feel uncomfortable and suspicious about her intentions.