Shin Ji-eun is a skilled international secret agent recruited by the Korean National Agency for Intelligence and Counterintelligence (KNAIC), a powerful organization, to track down and capture a dangerous madman who plans to unleash an airborne virus on a large portion of the world's population through a high-tech drone system. But as she begins her mission, she discovers that the true identity of the madman is none other than her own biological father, Shin Min-ho. Desperate to learn more ab