The Defects S01 E08 Final Refund

What begins as a camping trip soon turns into a living nightmare. Kim Se-hee's inhumanity reaches its peak as she executes her plan to massacre the "defects." To stop her once and for all, Ah-hyun and the kids rise up against her and her team, risking their lives for all the lives to avenge the ones already lost and protect those who could be next.