When two explosive personalities are forced to coexist, sparks are inevitable. Hyuna, a design student with a murky past that she is trying to confront, clashes with Kai, a boxer trapped in a violent underground system. Their differences fuel tensions and arguments. But the brutality of Kai's network catches up with them, drawing Hyuna into dangerous affairs. As she discovers this world, she uncovers buried truths, and their bond becomes a rift as disturbing as it is perilous.