In between Heaven and Hell, there is Akaran City. A place where angels indulge in sin and demons are treated like second-hand citizens. Here, lost souls arrive to receive final judgment. Levi is a demon who struggles to defend these souls against a broken system. It’s only a matter of time before he disobeys the laws set by an all-powerful God. Again.
Your basic idea of showing a disheartened demon working as a defense attorney in purgatory is novel, and could actually work as a tv show or feature film. However, this needs much more detail, thought, and characterization. Afte...