Throughout the exam, the students must answer difficult and sometimes bizarre questions that test their knowledge and critical thinking skills. As the pressure mounts and tensions rise among the group, they begin to realize that the exam is not just a test of academic prowess, but also a test of their morality and humanity.
As the clock ticks down and the students struggle to answer the questions, they must also confront their darkest secrets and past misdeeds that have brought them to this life or death situation. Meanwhile, the authorities outside the classroom race against time to try and save the students before it's too late.
As the students work together to try and solve the exam and save Hae-yeong, they must also uncover the identity of the mysterious mastermind behind the twisted game. Betrayal, deception, and shocking revelations will test the students' resolve and ultimately determine who will survive the deadly exam.
In a thrilling and heart-pounding climax, the students must make difficult choices and face their inner demons in order to outsmart their captor and escape from the deadly trap before it's too late. Only the strongest and smartest will survive the harrowing ordeal, but at what cost?