His Persephone

When the world is coming to an end and all hope seems lost, Dumbledore has a rather unusual request for Hermione. "1943? And you'd like me to...kill Tom Riddle?" Dumbledore shook his head, that annoying twinkle glowing thrice as bright as before. "No, my dear. I'd like you to join him." Full Summary inside. An interesting take on time travel.