Nam-soon begins her search for her parents in Korea but experiences some roadblocks. Geum-ju suspects something's off with her newfound daughter.

The incident at the Han River puts a spotlight on Nam-soon. As Kang Hee-sik spends more time with Nam-soon, he connects the dots about her family.

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.

Geum-ju pays a strategic visit to Si-o, who has his own motives. During a birthday dinner, Nam-soon's family questions her growing kinship with Hee-sik.

Hee-sik begins to worry about Nam-soon after Si-o promotes her into his inner circle. Geum-ju probes deeper into a suspicious businessman.

Nam-soon pulls off a bold heist, putting Si-o on high alert. During a tense meeting, Geum-ju challenges Si-o — who in return begins plotting his revenge.

Geum-ju falls victim to Si-o's attack but proves she's one step ahead of him. As Nam-soon finally tracks down the drugs, her brother succumbs to them.