Tartarus. The Realm of Hades.
Someone knocked on the door. Nobody ever knocked on Hades' door. Nobody ever came to Hades until he called. The loyal servant of Hades came to the door and opened it for the visitor.
"Who are you?" the servant asked.
"I am a messenger from Aphrodite."
"Since when does Aphrodite send a messenger to Tartarus to talk?" Hades asked. He examined the messenger carefully. The messenger was young and handsome, completely in the taste of the demanding Goddess. In the absence of her husband, she had as much fun as she could.
"Since it became dangerous to descend the Olympus. The issue is urgent and concerns the Guardian and the human."