This is a drama about a unknown mysterious disease spreads.

Kang Joo Heon (Yoon Je Moon) is the chief of epidemiological investigation at the Korea Centers for Disease Control and Prevention. He loses his beloved to the new virus and attempts to find a critical clue through reverse tracing.

Una enfermedad misteriosa se propaga. Kang Joo-Heon (Yoon Je-Moon) de el Centro para el Control y la Prevención de Enfermedades, intentas encontrar una pista crítica a través de rastreo inverso.