In order to break the next big case, Jang-yeol puts Ye-bun through the ringer. But after a strength-building exercise, Ye-bun's power begins to weaken.

Ye-bun begins questioning her grandfather's intentions. She later recruits Jang-yeol to solve an animal abuse case, in exchange for her help in his case.

Jang-yeol investigates a truly perplexing case of disappearing underwear. After Ye-bun aids him in his search, she witnesses a sudden betrayal.