Disclaimer: I own nothing.

Summery: Sequel to Memory of a lost Dream. An unknown disease is slowly killing Harry, the only one who can save him is Remus, but no-one has seen him for five years. It's up to Tonks to find him in time and convince him to come back.

A/N: Thanks to everyone who reviewed 'Memory of a lost Dream', I hope you will like this too. I'm turning this in a series of short stories, this is the second part and it will be approximately 5 chapters long I think (but that can change of course, I'm still writing it).

Blood of a werewolf

Prologue

It was warm and beautiful day at the beginning of summer, sunny but not too hot, and most people were enjoying this day outside, except for a select group of people who were standing just outside of a room in St. Mungo's. More precisely it was the room in which Harry Potter was lying.

It had been two years since the Boy-Who-Lived had defeated the dark lord Voldemort and during those years, the wizarding world had been rebuilding their world and homes, searching and sometimes finding those who were considered lost, they had also been working on a new and less discriminating society, thanks to Minister of Magic since two years, Kingsley Shacklebolt and his first assistant, Hermione Granger.

Today, both of them were part of the group of people standing outside Harry Potter's room in St. Mungo's, together with all the Weasleys and Luna Lovegood, waiting for the healers to come out of the room and let them know if there was any hope Harry might live.

Apparently, just before Harry defeated Voldemort, the dark lord had succeeded to bring some strange and unknown disease in Harry's system, it was an illness that took two years or even more to show itself clearly, but when it did, it was extremely violent and attacked ones system continuously until it was completely destroyed, obviously it ended in a certain death of its victim.

Finally, a healer exited the room, face grave.

"There is nothing more we can do for him, I'm really sorry." She said sympathetically, looking at the teary faces around her. "There is only one existing cure for this disease, unfortunately it is almost impossible to assemble all the ingredients."

"Nothing is impossible, as long as you believe in the possibilities to achieve the improbable, you can succeed." Luna's dreamy voice interrupted the healer. She was acting rather calm for someone on the verge of losing her boyfriend.

"Luna is right, as long as he is alive we still have a chance. What ingredients are so difficult to find?" Hermione spoke up.

The healer glanced around the group before answering.

"There is only one ingredient that really is a problem to find these days. The potion we need to give him needs werewolf-blood to work."

"And with Umbridge's stunt a few years ago, there are barely any werewolves left in Britain." Kingsley said what everyone was thinking, the healer nodded and answered "Indeed, Minister Shacklebolt."

"But there must still be some werewolves, somewhere, or we could try to find some in France or, I don't know, anywhere." Ron piped up, glancing towards his sister-in-law Fleur, standing next to Bill.

"Ron," chided Hermione, "I don't think it is that easy. Let the healer finish."

The healer nodded to the Minister's First Assistant in thanks and continued her explanation.

"Like Ms. Granger said, it isn't that simple, the blood we use must be compatible with Mr. Potter's blood and to know if the blood is compatible we need to know of which elements exactly the blood is composed, we also have to run certain tests. If we first have to go and find some unknown werewolves of which we don't have any files wherein the exact composition and concentration of their blood is stated, we would first have to analyse the blood before we can run the tests and there is always a high possibility the blood won't be compatible. Anyhow, we would never be able to produce the potion in time."

A long, desperate silence fell between the group until it was broken by Arthur Weasley. "So there is really no chance?"

Suddenly, Hermione's face lit up. "Wait." She directed the healer. "I've read about blood-compatibility like this once." (Ron groaned, but everyone else was listening hopefully) "Isn't there a possibility of knowing for a ninety percent certainty the blood will be compatible, without running the tests?"

All eyes were on the healer again, the woman sighed.

"Yes, that possibility exists, but only if the two people share their blood, by a blood-relationship, does Harry Potter share blood with a werewolf?" Her eyes went over the group and the answer was obvious by the once again downtrodden looks on everyone's faces.

Then Luna's dreamy voice could be heard once again. "People can also share their blood by ancient blood-sharing rituals."

"But those rituals haven't been used for centuries, they can be dangerous and are illegal, Harry never did such a ritual." Hermione exclaimed.

"Harry didn't, but his father did." Everyone looked up to Ginny, it was the first time she had spoken since they had come here. She took a breath and went on. "Harry told me this short after Sirius died, it was a secret and he asked me to never tell anyone." Ron and Hermione looked incredulously at her, since when did Harry tell her something he didn't tell them. Ginny answered their unasked question. "You two were so caught up in each other during that time and Harry needed someone to listen. Anyway, like I said, this used to be another well kept secret of the Marauders, Sirius told Harry this once. Apparently, the Marauders did such a dangerous blood-sharing ritual while they were at Hogwarts, to bring them closer than they already were."

Ron looked confused. "What has that to do with anything anyway?"

Hermione however understood where Ginny was going to. "The Marauders shared their blood, and the blood-sharing went over to Harry through his father." The others still had a puzzled look on their face. "ALL the Marauders. Remus Lupin."

"That might work indeed," commented the healer.

Finally understanding dawned on their faces, but their hope was immediately crushed again when Kingsley spoke. "Remus hasn't been seen or heard of for five years. Nobody knows where he might be or even if he is still alive."

Once again, it was Luna whose dreamy voice was there to give them hope again. "Those who travel far and long might know much without telling anyone and those who keep searching will eventually find."

Everyone stared at her, until Charlie said, "I know Hagrid has been travelling a lot these years, I've seen him a couple of times in Romania and Fleur, didn't you say you came across him in France once?"

"Yesz, and we 'ave also seen 'im during our 'oneymoon in Greece, haven't we Bill?" Fleur glanced towards her husband, Bill nodded.

"Let's ask Hagrid then, he is now back at Hogwarts isn't he?" asked Ron.

Fred, who was responsible for the Hogsmeade division of Weasley's Wizarding Wheezes, nodded. "I think so, I've seen him a few times the last two weeks, but I think he's planning for another trip soon."

"Alright, I'm going to talk to him tomorrow." Ron answered.

"Wait." As the minister spoke, everyone grew quiet and turned towards him.

"I think Tonks should go talk to him." The others looked a bit puzzled.

"Tonks has kept searching for Remus for the last two years, when everyone else had long given up. If anyone can find him, I think it will be her, if Hagrid gives her a clue about where to look. I'll go talk to her right away."

The other members of the group nodded and Kingsley left the hospital immediately and headed towards the office of Nymphadora Tonks, Wizarding Private Detective.