Night has come (VOICE)

When class 2-3 arrives at a retreat center, the rest of the classes are nowhere to be found. Their teacher goes out to look for them, and they are left alone in the building. Yoon Seo and all of her classmates get a message out of the blue. Each one of them receives a role, and the game begins

As morning dawns, the kids try to figure out what this game is actually about. They realize that they can’t leave the boundary indicated in a white line all around the retreat center. Things only seem to get worse as they start testing the rules and doubting each other more and more

The kids feel guilty and sad about the ones who have died, and this pushes them to drift apart and blame one another. Kyung Jun, the class bully, continues to pick on others and use them to test the rules of the game. Meanwhile, Jun Hee has an idea to refuse to vote for anyone in the game that night

As Jun Hee’s plans to refuse to vote backfires, a bloodbath sweeps the assembly hall. The remaining kids are as divided as ever in the aftermath of losing so many kids in one night. Meanwhile, Yoon Seo is suspicious of the visions she keeps having.

Woo Ram, the one with the highest votes so far, is about to lose his mind out of fear, and Kyung Jun, the one with the second highest votes, tries to take him down before midnight. Meanwhile, Yoon Seo is stuck on the second floor and finds a photo of the girl she saw in her dream

Kyung Jun tries to control the rest of the survivors after he catches the second Mafia. He wants to get back at Jun Hee and the rest who voted for him instead of Woo Ram. Furthermore, Kyung Jun and his friends start to suspect Yoon Seo, who knows where to check the security camera footage

Seung Bin is the next target who gets killed by the Mafia overnight. The survivors find him dead on the floor, and one of his friends is washing the bloody clothes in the toilet. Meanwhile, Yu Jun witnesses Kyung Jun and Jin Ha walking out of the building.

Jun-hее’s plan backfirеs spеctacularly, turning thе assеmbly hall into a scеnе of gruеsomе chaos. As thе lights flickеr and panic sprеads, thе studеnts arе forcеd to makе a dеspеratе choicе: votе or diе.

The deaths of Jin Ha and Kyung Jun, both innocent Citizens, heighten the students' sense of entrapment. The prevailing unease about the unreliability of seemingly plausible information forces them to prioritize unmasking the Mafia swiftly for their own survival

With Na Hee exposing her identity, everyone discovers that So Mi's the Mafia, placing Na Hee in danger with her police role now known. Na Hee devises a plan to unveil the Mafia even after her potential death. Meanwhile, the focus shifts to Mi Na as the next target in the voting process.

The Mafia Game nears its conclusion as more classmates are executed. Da Bum continues to threaten the remaining students’ lives. Meanwhile, Jung Won faces a dilemma with her life at stake, and Yoon Seo is unexpectedly exposed to the shocking secret behind the game and the people involved in it.