Countdown

Overview

The apartment complex is now without electricity. Sae Bom and Yi Hyun find traces of an infected person inside Building 101. Who could be infected? The residents suspect others of being infected and wait for the lockdown to end. Meanwhile, Tae Seok makes a decision knowing that the antibodies may be inside Sae Bom.

Guest Stars

Lee Kyoo-hyung

Lee Seung Yeong [Special ops unit]