That reminds me of the T.V show 'Lucifer' which is where the Devil himself grows bored being the Lord of Hell and abandons his kingdom to run a nightclub. Somehow he gets involved with the LAPD and assists a dectective in crime cases.

That kinda 'I want to be among the humans and live life' vibe reminded me of the show. I've never seen it, but I've heard about it and it seems interesting, if kinda wacky. 'The Devil fights crime!'