16 years ago, in the year X775, there was an incident, involving six children, which was hidden away and covered up. The way it managed to stay hidden so well for so long is because of the families the children belonged to. The incident involved the heirs of three of the richest families at the time: Connor (age 10), Jackson (age 6) and Amelia (age 7) of the Jurnelle family, Diana (age 9) of the Sullivan family and Lucy (age 8) of the Heartfilia's. The sixth was the daughter of a Jurnelle servant named Marie (age 9).

As many children they were curious and tried being adventurous, and considering the vast amount of land and wealth each lived with there was always many opportunities for exploration. They were a creative bunch, which explained how they always found a new adventure. The boys, Connor and Jackson were the most adventurous and reckless of the group; Amelia and Diana were the creative pair, always finding a way to up the ante; Lucy was the key to the base of their explorations.

Of the bunch Lucy was probably the most curious, she loved stories and spent as much time as possible reading anything she could get her hand on. She would always tell her fellow heirs about the stories she read and they always led to a sort of exploit for them.

One day, while in her family library she discovered a book about a legend that involved one of the Jurnelle's abandoned mines that was just outside their main estate. The story was about a heroine who fought against a demon, called the Lost Demon for it possessed a form of Lost Destructive magic. The story ended with the heroine defeating the Demon and locking it away into what were now the underground, unused tunnels of the Jurnelle's mine.

Mesmerized by the story Lucy told her friends who were not only fascinated in the story but also determined to explore the factuality of it. They all had ideas on how to get to the mine and find remains of the legend, except for Lucy that is. She felt that it was too dangerous, that if the kind of dark magic that was mentioned in the legend was really locked away in the mine then it should be left undisturbed. The others did not comply though and in spite of her reluctance Lucy eventually gave in and agreed to participate too.

With all five in agreement they went to the Jurnelle study and began planning their adventure to discover the Lost Demon. While doing so they were unaware an outsider was listening in on them.

After a few days of planning and mapping the five children felt they were ready for their next exploration through the abandoned Jurnelle mines. While looking into the legend and the mines they discovered tunnels that were considered forbidden and thus never used. They concluded that those tunnels were the best place to find fact in the legend.

With a map and flashlights the adventurous kids set out and quickly got through the passages previously used when the mine was still active until they reached an entryway that had been blocked off.

"Now what?" asked Lucy as she looked at the boarded up pathway.

"We go though," answered Connor, "we're all small enough."

"Are you scared Lucy?" asked Jackson, noting the face of caution the girl wore.

"What, no!" she responded defensively, "It's just… are you sure it's safe to be down here?"

"It's fine," said Connor confidently, before conceitedly adding, "These mines were worked on for years. The only reason our father closed them was because all the gold in it was mined out. It was worthless for our family to keep it open."

"That's not what I mean–"

"Come on Lucy," interrupted Diana, "We came this far, it's fine. Let's go."

Even though Lucy felt something nagging her that going further was a mistake she decided to ignore it and continue moving forward with the others.

Connor was right, for all of them managed to squeeze through the spaces between the boards and make it though the entryway, which led into a narrower tunnel. There was only one way to go so it was easy for them to navigate through. The walked one-by-one, with Lucy leading the way followed by Diana then Amelia, who was holding tightly onto Diana, then Jackson and finally Connor in the back.

It took them some time but they finally reached the end of the tunnel, which had opened up. They were in some sort of cave.

"We should look around," suggested Connor.

"Look for what," asked Jackson.

"I don't know, clues or something."

"Like this," said Lucy.

The others gathered around to where Lucy was to see what she was looking at. Her light pointed at the wall, which had what looked like ancient writing on it.

"What do you think it says," asked Diana, the question primarily being directed to Lucy.

"I don't know, but I think we just found the Demon chest," answered Lucy as she pointed her light to a sealed cut out in the wall.

Looks of excitement and fear flashed onto the faces of the children. Their adventure had turned out to be a success but still being kids, the immensity of what that meant was lost to them.

"Who wants to open it," asked Connor.

"I'll do it." The voice that spoke out came from behind them and scared the off guard heirs. It was Marie, though it took some time for them to recognize her as a servant's child.

"What are you doing here? Did you follow us?" asked an annoyed Diana as she regained her composer.

"How did you know about this?" asked Jackson.

"I over heard your guys' plan and wanted to come," answered the girl softly.

The remark didn't sit well with Connor. A look of detest spread across his face as he scoffed, "how absurd. Don't you know your place? You're just some peasant's daughter. I mean–"

"Cut it out," interrupted Lucy. Though financially she was equal to her fellow heirs she did not share their superior attitude. She was taught to respect others regardless of their formal standing thus Connor's outburst, and the look of distaste on the others faces felt wrong to Lucy.

"We should go," she said, "I have a really bad feeling."

"No way. We got this far and now we even have a volunteer," said Connor as he walked over to Marie.

"He's right," said Diana, "if you want to leave then go ahead but servant girl here said she would open the chest and we did come here to find it."

Jackson and Amelia nodded in agreement to what Diana and their older brother were saying. Lucy was feeling stuck again, but then Amelia went from holding onto Diana to taking hold of Lucy's hand indicating that she wanted her to stay.

Lucy closed her eyes and sighed, muttering out "fine, I'll stay."

They all moved so they were standing around the sealed case in the wall, looking for a way to open it. After looking around for a bit Connor believed he found 'instruction' on how to open the case. Lucy deciphered it as 'to open the chest of the Lost Demon one must apply pressure onto the seals of the chest' or something along those lines.

Now was the moment of truth, the heirs all bunched together, holding on to each other in anticipation. Marie moved forward towards the case to open the seals of the Lost Demon.

"You don't have to do this," Lucy said in a last ditch effort to end things before they went to far.

Marie looked back for moment but ultimately decided to ignore the little blondes remark. She found the marks on the case and placed a hand on each of the indicated seals then pushed.

The horrors that followed were worse then any of them could have predicted.