50,000 years ago, Hell was destroyed because of too much Foul from the resentment of the souls that later turned to Soul Eaters and devoured everything in their wake, leaving nothing of Hell. The gods above in Heaven, in order to take care of the newly-died souls, created the Afterlife Department comprised of grim reapers. Huo Ling was delivering food that day when he met Yi Bing and the guy gave him a warning. When he arrived to the customer's unit, he was killed. Huo Ling: you set up a death flag for me! Yi Bing: I'm a grim reaper. I'm the flag myself. Let me help you solve the mystery of your death. Huo Ling: your sister! Alternative title: The Different Ways I Died at 23 Update: daily
"Fortunately, we made it in time!" Huo Ling said as he looked down from the rooftop of the building and he and Yi Bing watched the police arrived and took Wu Xiaoxiao away.
Yep, it was him and Yi Bing who saved Wu Xiaoxiao earlier, and they saved her from a Soul Eater who wanted to eat Wu Xiaoxiao. Yes, it was a Soul Eater who wanted to kill Wu Xiaoxiao. That is because of the heavy yin energy in Wu Xiaoxiao's body due to her feeling very stressed from her work lately.
Before this, on their way to meet the other grim reapers in the mortal realm to help these junior grim reapers kill the Soul Eaters, they received a message from Gu Shi who was given a notice by Sha Jiu that an Abnormal Soul was about to appear. Just like Huo Ling before, this soul will become an Abnormal Soul after it dies because it would die prematurely.