Having little options in her state of being, Ji-su agrees to take a big risk. Yi-kyung returns to Green Home just in time.

When a team of outlaws take over the building, the residents are shown how humans can be even more barbaric than the monsters.

Hyun-su saves the others from a deadly attack. Running out of necessities, Eun-hyeok announces a plan to venture outside for resources.

A military leaflet promises a route to safety, but the group is reluctant to trust it. Hyun-su is exposed to a new perspective on his condition.

An unexpected savior protects the children from harm as Hyun-su, together with Yoon Ji-su and Jung Jae-heon, tries to bring them to safety.

Tasked to carry out dangerous missions, Hyun-su heads back to retrieve Han Du-sik. Sang-wook stops at nothing to finish what he started.

As a state of emergency is declared, the residents tie up Pyeon Sang-wook for being bitten. Hyun-su is unable to ignore a family in distress.

Cha Hyun-su moves into the run-down Green Home by himself. Not long after, he witnesses a disturbing sight in his neighbor's apartment.

Critical information about the monsters is made public. When residents are split on what to do with Hyun-su, Lee Eun-hyeok suggests they hold a vote.

An Seon-yeong confronts the greatest monster in her life. Leaving the building, Seo Yi-kyung heads to her fiancé's office in search of answers.

The girl contemplates her future with Yi-kyung — and a life away from Ui-myeong. Sergeant Kim encounters Eun-hyeok, who reveals a new kind of being.

Eun-hyeok's reunion with Hyun-su and Eun-yu turns into chaos. Ui-myeong prepares for his body transfer, while Sergeant Tak carries out his own plan.

Eun-yu finds a hint of Eun-hyeok’s fate at a stop in her journey. During an experiment, Hyun-su finds that he has a special effect on another monster.

Yi-kyung discovers Ui-myeong's true motive for him and their daughter. Eun-yu accepts a challenge from Hyun-su's alter ego and heads to the stadium.

In her trek to the stadium, Eun-yu begins to feel a personal worry. While Ui-myeong searches for the girl, she plans a counterattack in the background.

Hyun-su and Eun-hyeok arrive at the stadium, splitting up to find Ui-myeong. During the great escape, Sergeant Tak commits the ultimate sacrifice.

Hyun-su wakes up to find Sang-wook, who has a new goal for them. Lee Eun-yu and Ji-su escape a violent evacuation and commandeer their next destination.

As Yi-kyung faces death, the young girl tries to save her. In the ruins of the lab, the soldiers discover other survivors who aren't what they seem.

Resolved to find his child, Jung Ui-myeong heads to the stadium. Despite Hyun-su's unpredictability, Eun-yu tries to wake him up during a sudden crisis.

On a mission to find her husband, Yi-kyung makes a shocking discovery. The battered Ji-su and Eun-yu arrive at a new shelter, but catastrophe awaits them.

Eun-yu shares a terse reunion with Hyun-su. While the platoon embarks on their search for a missing soldier, the stadium experiences a monster threat.

Hyun-su gives it his all to bring Yi-kyung’s humanity back. Sergeant Kim faces countless monsters in an effort to make it out alive with his men.

In the final battle, Hyun-su and Eun-hyeok confront the girl head-on — getting an assist from an old friend. Will they finally succeed?

Eun-yu chases Yi-kyung and the girl, with Park Chan-yeong right behind her. The death of survivors and a missing soldier throws the stadium into unrest.

The survivors take shelter underground, where supplies run low. In her continued search for Eun-hyeok, Eun-yu encounters a young girl.

Sergeant Kim and Master Sergeant Tak clash on how to protect their men. The mysterious girl approaches Eun-yu with an enticing offer.