The criminal at large seems to be attacking only certain people. Concerned for Bong-soon's safety, Min-hyuk and Guk-doo clash over how to protect her.

Not able to trust one another overnight, Bong-soon, Min-hyuk and Guk-doo decide to play games instead, evoking the two men's competitive spirits.

Profilers suggest misogyny motivated the recent crimes. Bong-soon decides to put her dream of developing games second to catching the culprit.