In the realm between heaven and hell, you are one of the people who didn't make it to any of those; you're a lost soul — your death occurred in the 25th of May, a man was following you from your way home and stab you on the back multiple times, your death was unexpected and "accidental". But despite dying, both the heaven and the hell disapprove your request to go in, it was rather then announce that you're a lost soul who needs to prove themselves to enter the gates of heaven or hell.
You were given a task by the Lord: "Find this man and change him. His name is Yvenz but he must NOT know you're a lost soul"
You made your way back to the earth, determined to complete the task so you can finally have a peaceful death. Finding the man you were supposedly to change for better.