Joey's head was full of thoughts as he made his way home from school.

He couldn't remember how long he and Yugi had been friends now, but he knew that the events of the past few days would never be forgotten, by himself, Yugi, Tea or Tristan.

Since Yugi introduced Joey to the card game known as Duel Monsters, nothing had been the same.

It hardly seemed like a couple of days ago that Yugi beat the world champion Duel Monsters player, Seto Kaiba, in a duel. Joey would never forget that duel.

Kaiba only duelled Yugi's grandpa to try and get his ultra rare Blue-Eyes White Dragon card. And when Kaiba did win, he tore up Yugi's grandpa's Blue-Eyes! And when Yugi decided to duel Kaiba himself to get revenge, they played on a field where the monsters actually came to life using Kaiba Corp's revolutionary holographic technology.

As Joey turned the corner into his street, he smiled as he remembered Kaiba's face when Yugi summoned the unstoppable Exodia and won the match!

Then Joey's heart sank a little as he remembered that he didn't have his Duel Monsters lessons tonight. Solomon Muto knew so much about the card game, and Yugi had persuaded him to teach Joey how to play properly. Joey had been working non- stop under Solomon's tutoring, but it looked like he'd have to wait a while until his next lesson. The head of Industrial Illusions, the company that makes the Duel Monsters cards, Maximillion Pegasus, had sent Yugi a package containing a weird glove, some stars and a video. Pegasus must have heard of Yugi's defeat over Kaiba, just like everyone else. When Yugi put the video on, he had to duel Pegasus! On a video! Joey hadn't quite figured out how that worked, but he knew that Pegasus beat Yugi and snatched his Grandpa's soul! Joey didn't actually remember it happening, but he knew that it did.

Joey sighed as he pulled out his keys to open his apartment door. So much had happened to them, but he had a feeling all the trouble had just begun.

Joey got inside and realised his father wasn't home again. He threw down his backpack and fell on to the sofa. What more could happen? And how were they going to get Solomon's soul back?

Just then, Joey noticed the mail on the coffee table. He began to shuffle through it absent-mindedly. He stopped as he reached a square package addressed to him.

He pulled off the paper, and found a video inside. There was no label or note or anything.

"Wonder who this is from?" Joey said to himself. He shrugged and put it in the video player and pressed the play button.

"Hey there, big brother. How've you been? I really miss you."

"Serenity?" Joey stared at the TV in disbelief as his little sister's face appeared on the screen, smiling her same usual smile, but looking a lot older than she did when Joey last saw her.

"I can't believe it's been six years since we've seen each other!" Serenity's image beamed. "I'll never forget the day mom took me to live with her."

Joey's head filled with the thoughts of the day when that happened. He could even see it playing out in front of him. He didn't think he'd ever forget that day either, even though he wanted to.

"I'm sending you this video just so you don't forget your little sister's face."

Joey stared at the screen, dumbstruck. How could he ever forget Serenity?

"It seems like I'm running out of time. I was hoping to see you once more before...well, you understand. Bye-bye, brother."

"Run out of time?" It can't be..."

"So long. Take care, Joey." Serenity's face faded from the screen.

Joey stared at the TV, his eyes brimming with tears, hoping there was something more on the tape. But there wasn't. "Serenity..."

Joey tossed and turned in his bed that night, thinking of Serenity. It couldn't be happening, could it? She couldn't really be going blind?

Joey felt confused. He was at a loss. He couldn't contact Serenity, as she hadn't left an address or telephone number. If the time really had come, he knew that the only way forward was for his sister to have the operation that he heard his parents talking about all those years ago.

From memory, he recalled the price of the operation was expensive. Very expensive.

Joey tried to concentrate as he remembered his promise to himself when he was a kid. He wasn't about to let Serenity down now. He needed to find the money for the operation.

But how...?