Synopsis

The military reports success in the recent monster attack, but are then informed that it was merely the beginning of the '4th Wave,' a catastrophic event. Simultaneously, Lee Hyunwook undergoes a painful transformation due to consuming a devil's medal, while also reflecting on past sacrifices made by him and his comrades for their cause. It's revealed that Lee Hyunwook's past actions have allowed him to gain access to military resources to prepare for the upcoming fight.