A shocking reveal after the 15th game disrupts the class rankings, and prompts complaints from students about flaws in the voting app. Ha-rin has a plan to restore order. A savage game of dodgeball works to Ha-rin's advantage...until the ball stops.

Su-ji is trapped by Ha-rin's blackmail. She feels bad keeping a secret from Ja-eun. The class goes on a school trip. Tension builds until everything explodes in a game of survival.

The students are upset about a violent assault that occurred during the class trip. A powerful allyship gives Su-ji hope. Su-ji acts on her plan to take down Ha-rin.