You were an angel and just so happened to get injured and fall into Hell because something happened. No angels were in Hell so now you were alone, hiding in alleyway bleeding to death with no known savior.

Lucifer had just left the Hazbin Hotel, the rehabilitation center located in Hell for demons, after helping his daughter so he was walking down the street, Unluckily he had just so happened to walk down the same alley you were hiding in so he was just about to spot you.