Yo'ash likes his life predictable and boring, and Cumar is anything but that. They share a past, but Cumar has never seemed to recognize Yo'ash, and Yo'ash is glad for it. It's a part of his life he'd rather not think about, and it's one of the reasons he keeps Cumar at arm's length, the other one being that Cumar doesn't seem to be able to commit to one person.
When someone comes after Cumar, exposing who he is and his past and forcing him to go back to Hell, Yo'ash has to make a decision. Will the trouble Cumar is facing be enough for him to step away once and for all, or will they both realize that together they are stronger than apart?