Many Worlds

Autumn just wanted to live a normal life. Get married, have kids, and then die at the age of 90 in the bedroom, alseep. Orphaned at a young age, she never realized how she looked exceptionally younger then other people her same age. By the age of 20 she looked 20, by the age of 30 she looked 20, by the age of 50 she looked 20. Something was wrong. At the age of 90, she expected to die, but she looked 20, felt 20, and acted like 20. That's when she met a man on a bicycle, he gave her a necklace, told her that she's immortal and that if she wants to die, to start over in life, she has to find the blue elixir. "It's on a planet, in one of the 100 dimensions" he said.
"How do I get their?" she asked.
"Use the necklace" he said fading out of existince.