On the Line

A former detective Seo-joon (Byun Yo-han), now head of the field operations team at Busan construction site, along with his family and colleagues are victim of voice phishing. He tracks down the organisation and penetrates the call center in China. Surprised by the systemic approach and scale of voice phishing, he meets Pro Kwak (Kim Mu-yeol), the head of the planning. He knew that he has a herculean task ahead of him to recover the scammed money.