Underworld: yesterday
"Enough!" Hades god of the underworld yelled.
Hundreds of spirits just stepped off of Charon's boat. Hades was tired of this, dead people, were everywhere. And he never got any peace.
He had been tricked into this situation by his brothers eons ago, and it had finally made sense. He didn't have to deal with it.
Hades walked up to Charon, who was about to push off across the River Styx to pick up some more dead. Hades whispered in his ear, Charon listened carefully and when Hades finished, he looked up to the god, bewildered. " B-But my Lord..." Charon started, Hades raised a hand to silence him. "My decision is final." He snarled happily. Charon trembled and bowed respectfully.
"Yes, sir." And Charon was gone, to deliver Hades message to his daughter Celeste, who was Death.
Earth: today
The world had fallen into chaos.
In Afghanistan (the war) people were being shot and sliced, but they wouldn't die. They bled, but they didn't die. They screamed, but were never silenced.
In the United States a man was mugged and stabbed, but lives, screaming in a dark alley.
In Africa, children starve and lay down to die, but they don't die. They continue to live with a familiar pain in their empty stomaches.
In Australia, a woman is bitten but a poisionous snake while doing laundry. But she doesn't die, instead lays, writhing in pain until she is taken to the hospital.
Death had abandoned earth, leaving the weak, hungry and injure to breath in the fumes and absent Death.
Over the next week, the shocking news of Death abandonment reaches the whole world, leaving them hungry for Death, for an end to their pain.
Earth begins to look like it's populated by zombies not humans.
Animals attack humans, knowing that they can't die. The whole world is falling to ruin. Whole families fall to their knees and pray to Hades for Death to take them and their loved ones.