Despite his job as a corrections officer, Jeongwon is terrified - but it’s not the incarcerated criminals that scare him. No, what Jeongwon is scared of is the possibility of someone discovering the secret love he’s being harboring for his stepbrother, Yejun. But when the two come face to face in the confines of the concrete cells, Jeongwon will not be able to hide any longer. Forced to confront his past, will Jeongwon be forever bound to his guilt? Or will he finally break free of the prison he's created for himself?