A strange kind of debt repayment has begun. Gu Tae-geom, a section chief at the illegal loan company 'The Escape'. Chae Hee-on, the only female clerk, the accountant. They’re nothing more and nothing less than boss and subordinate—until something changes between them. “My grandmother’s hospital bills are three months overdue.” “Find somewhere else. I can’t lend you money even if you’re going to starve today.” He bluntly refuses, but Tae-geom keeps being bothered by a side of Hee-on he’s never seen before—weak and vulnerable. Then he saves Hee-on when she’s in danger, and they end up drinking together. While Tae-geom is passed out drunk, she almost steals a kiss—sliding her lips against his as if by theft. “…You, damn it.” “Why are you cursing me? Was it that bad?” Only much later does he realize that the kiss was actually a ploy to fish out the office safe’s password. Still, Tae-geom can’t bring himself to abandon Hee-on, who’s standing at the edge of a cliff. “Write this down. Don’t miss a single word.” A pitiful IOU scrawled on a torn napkin. Twenty thousand won a day. Pay back in cash only. “I’ll hunt down anyone who borrows my money to the ends of hell.” Their exhausting days are measured by exchanging those 20,000-won payments. They don’t know whether they’re repaying a debt or accumulating one; the days pile up. And those days start to sink deeper into their lives.