In the gripping thriller "Best Friend" (2020), Daekwon finds himself on the brink of professional disaster as the leader of a surveillance team. Facing demotion and the pressure of being the sole provider for his family, he is tasked with an unusual assignment: to monitor a high-profile politician's family under house arrest. With his dedicated team disguised as unsuspecting neighbors, Daekwon embarks on a 24-hour mission, delving into the daily lives of the seemingly ordinary household. As they listen closely to whispers and rustling sounds, they unravel a web of secrets hidden within the walls. From intriguing radio show requests to unsettling late-night activities, each revelation draws them deeper into a world of intrigue and danger. As tension mounts, Daekwon must navigate the line between duty and morality, raising the stakes for himself and his team. Will they uncover the truth behind the politician's family, or will the shadows of their surveillance lead to unexpected consequences? "Best Friend" is a riveting exploration of loyalty, deception, and the lengths one will go to uncover the truth.