After a dramatic reunion, Nam-soon becomes closer to her family. As Hee-sik continues to investigate a drug case, Nam-soon lends her assistance.

As Nam-soon assists Hee-sik in his drug investigation, she has a run-in with the ominous Ryu Si-o. Ri Hwa-ja plots her revenge against Nam-soon.

Hee-sik witnesses the jarring effects of the drug when it strikes his team leader. Nam-soon's search for evidence garners attention from foes.