Before Farideh took a devil's pact, before she was Chosen by the god-king of the Hells, before any of this started, there was Bryseis Kakistos, the original Brimstone Angel, first of Farideh's line. Now, at the end, there is also Bryseis Kakistos--but this time, instead of helping the king of the Hells achieve godhood, she's going to kill him. All she needs is a little help from Farideh--which she should, by all accounts, be happy to give. After all, who could object to killing the king of the Hells? Except, it turns out, Farideh. Because as always, things are far more complicated than they seem.