Back to the 1980s. The residents get invited to an old-timey tteokbokki cafe. The cheesy comments of the familiar-looking DJ Woo-sik and nostalgic songs liven up the mood! A gang chases a mysterious man, and a dangerous fight ensues! What's the truth behind today's case? Throughout the war of nerves and brawls, all hints point to one place! Will the residents uncover the apartment's secret?