Character Arc
Park Jae-young is the Debtor, a man buried under private loans after his finances collapse. Cornered by lenders and running out of options, he becomes the desperate spark at the center of Karma's chain reaction. His attempt to claw his way out of an impossible situation sets in motion the violent event whose fallout spreads to everyone else in the ensemble.
Jae-young embodies the series' theme of moral consequence: a person who keeps choosing the worst available option in the hope of escaping the last bad choice, only to deepen the trap. His arc illustrates how fear and debt can erode judgment, and how a single scheme can entangle bystanders who had nothing to do with his troubles. The show treats the resulting violence in restrained, suggestive terms.
Lee Hee-joon plays Jae-young as a frayed, increasingly cornered figure whose desperation drives much of the plot's momentum. Within the interlocking structure he is a key origin point: many threads trace back to his actions. His specific scheme, relationships, and ultimate fate should be verified against primary sources before publication.