An Geo Ul, a relentless advocate for social justice, moves into Baek-sae Apartment and is disturbed by a loud, unexplained banging noise every night at 4am. Determined to find the culprit and put an end to the insomnia plaguing the residents, she recruits her eccentric neighbors to help, all while uniting them in a common cause. The story highlights her tenacity and emphasizes the importance of community solidarity.(Source: MyDramaList)