A long time ago, all the many realms were connected and guarded by the Kingdom, and in the Kingdom there lived twins, a Prince and Princess, destined to follow their parents' footsteps. They were bright and curious about the universe around them, and every day they would explore new places and learn new things. Their parents said they could cross over into any realm.

But they were told to stay away from the portal at the South Gate.

For a long time, the twins kept away from the South Gate - but one day, the portal flashed a bright blue, and they no longer could contain their curiosity. They snuck out of the palace and crossed through the portal. They saw people on the other side, who claimed to open the portal for scientific reasons to benefit mankind - but one of them attacked the twins. Before he could finish them off, someone from the Kingdom - a protector - emerged from the portal, and a short battle ensued, giving the twins enough time to cross back through the portal. They didn't cross back alone, however, as two people followed them through, one of them being the attacker. The twins fled into the labyrinth in the garden, but the bad man pursued them, demanding to know about the secrets of the universe and gain power.

He cornered the twins at the very center of the labyrinth, and he attacked them once more. The protector raced to help the twins, but there was no hope of saving them. In rage, the protector summoned his greatest powers, used them to defeat the bad man once and for all. The power surge almost crossed the portal, causing an apocalypse on the other side, but the King and Queen closed the portal after throwing the second intruder into the dungeon. The King and Queen grieved at the loss of their children, but the protector revealed he placed an enchantment on them right before they died: he assured them that the souls of the Prince and Princess would return one day - perhaps in a different time, a different place, a different form, but the twins would return and claim their throne.

The King and Queen ordered the protector to watch over the portal's town, to make sure no one but the twins would cross over. For decades he watched the town, waiting and waiting, slowly slipping into madness. People in this world kept trying to cross the portal, trying to uncover the greatest secrets of the universe. He foiled them all, wondering when the royal twins would ever show up.

In the summer of 2012, they finally did.

A/N: This story is adopted from "The Demon's Lullaby" by Sapphire Teardrops. I had an idea where the story could go, so here it is! I'm sticking with the concept of the original story, so this will follow a Pan's Labyrinth kind of arc. But I'm also using episodes from the show, showing how I think the series could go. Hope you guys like it!

For the portal-gate, picture Stargate.