The angel of death gets tired of just killing by using normal means, starts considering his work to be art and begins crafting complicated, often non-sensical artistic death scenarios for all of his killings.
Think Final Destination meets Wile E. Coyote inside The Usual Suspects. It’s a comedy following the life of the investigator that is trying to put together why all the infrastructure in this city has started failing and where people are getting their rocket skates. Another investigator from the afterlife is trying to make sense of the sudden imbalance in the death books.
Art is a messy business