Sins of the Fire: Purgatory picks up where the first book left off, with Kane and his friend Imani preparing for a much-needed vacation. Their plans are abruptly interrupted when Kane is attacked and swallowed by Jonah, a humanoid angel and Remnant. Within Jonah's labyrinthine realm, Kane faces a dire choice: to sacrifice Mysherra or find another way to escape. With the help of fellow prisoner Bobby Thomas, Kane challenges the oppressive system, embracing the strength of Mysherra's past wielders and seeking true freedom.Outside this realm, Kane's disappearance creates a void for those who knew him, yet Imani senses something missing. Her investigation into the Church of New Haven reveals the depth of its influence and the hope of uncovering the truth about Kane's fate.