Voice 4: Judgment Hour (2021)

Revolves around an emergency call center and the employees who attempt to fight crime using the limited information they get from the urgent calls they receive. Kang Kwon Joo is a life-saving voice profiler. Derek Jo, a unit leader at the LAPD who winds up collaborating with the Golden Time Team. A tough perfectionist who refuses to accept even the smallest mistake, Derek Jo will be a force to be reckoned.