You saw something that you weren't supposed to. It didn't quite belong there. Maybe it was a door where there should be solid wood, a forest clearing in the middle of a busy street, or a small light in the middle of a dark tunnel. Normally you would dismiss it as a trick of the mind, but today you chose to go further. You opened the door, touched the light, and you wake up in a rather strange but somehow familiar place.
A beautiful fairy in a flowing robe and tall pointy hat approaches you. She says,
"Welcome to the Roseiverse. We hope you'll stay a while.
You can stay as long as you want here, enjoy a moment of respite amidst the chaos. And when you go, you will find that you've always known how to arrive again. You could come in to the Celestial Library and browse the stacks - a wealth of stories and knowledge wait for you. If that doesn't strike your fancy, you can visit the halls of the Astral Gallery - you're bound to be entranced by the beauty of the art. When you're done, you can stop by the Cosmic Hall to learn more about the etheral creator of this plane of being.
Welcome again. You've always belonged here. We hope you'll stay a while."
You think you'll do just that.