Lucifer Morningstar was once one of God's beloved sons along with his twin Michael. However Lucifer was always troublesome and his father couldn't keep him under control and therefore cast him out of heaven making him a fallen angel.
Lucifer then became the King of Hell. He was such for centuries and as much as he loved ruling over the demons and all of hell, he became bored with the same old antics. He wanted to do something different, something exciting. So he decided to take a trip to the city of angels, Los Angeles..... to walk among the normal humans.
For a long time he would keep a low profile and when he came across a villain, he would send them crazy, sending them to an eternal hell in their own heads. However, when a detective walked into his nightclub Lux, his life changed all over again, for the better.
Now Lucifer is in love with said detective Chloe Decker and has been working cases with her as a consultant. Life seems to be as good as it's going to get, but then, the family that he forgot he even had all start to turn up in Los Angeles and nothing surprises him more than a few people from the future and an alternative world...