There is never a quiet day at Gwangseon Jugong Apartments! From noise complaints and suspicious neighbors to the petty villains who drive everyone mad, the incidents are non-stop. Fed up, four women join forces: Gong Miri, a sharp-eyed deduction specialist; Choo Kyungja, a former detective whose fists move faster than the law; Park Sohee, the ultimate neighborhood informant; and Jeon Jihyun, a former insurance sales star who knows everyone's business. As a single unit, they tackle the complex's chaos with a flawless division of labor. What begins as investigations into mundane apartment life soon spirals out of control, revealing shocking missing links. Joined by laughter and fierce loyalty, this unstoppable "womance" team is ready for action!