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.

The drug infiltrates Nam-soon's family — prompting a search of the source and an antidote. A mourning Hee-sik furiously goes after Si-o's inner circle.