Summary: After the murder of her parents at the hands of the Hales. Allison Argent and Stiles Stilinski return to Beacon Hills after spending the summer training, they are now much more strong, but are no longer human, they only want revenge and they are very thirsty, old and new relationships are formed, while a war begins. Re posted now with a beta

Crossover TW/TVD, Stallison (frienship), Scallison, Slash Stisaac, Jydia Kol/Jeremy, Rebekah vs Lydia

Disclaimer: I do not own Teen Wolf or The Vampire Dairies, I just own the plot

I want to thank to kitten2010 who edit and corrected this fic.

Bloody Senior Year

Chapter One: Prologue

Everything has happened so fast, they hadn't been able to avoid it. The guilt was there, the grief was bigger, but the desire for revenge was the greatest of all.

Allison Argent and Stiles Stilinski, both seniors at Beacon Hills High, both now orphans,

Their parents were murdered by the hand of someone they thought they could trust.

It all happened after the alpha pack came, during a crazy junior year with a lot breaking up and getting back together and heartbreak all around.

Scott broke up with her to keep her safe or so he said. Allison didn't need that though, she was strong and confident. She had learned how to be fond of that pack. Stiles was just starting to come into his own great intelligence, but he had been replaced in his best friend's eyes by Isaac.

They became close friends when the pack turned their back on them. After that, they needed each other's company. They couldn't stand to be alone. They grew to be best friends. She saw the potential in him and started training him. They spend so much time together that eventually their parents became friends too and they were all happy, even without the pack.

The pack defeated the Alphas in the beginning of the summer but then new hunters came to town. They were Gerard's loyal followers. They attacked the Hale pack without warning, burning the train station to the ground. The wolves got out alive and safe, but that wasn't enough for Derek. He thought that Chris was the one who sent them and he wanted revenge.

Derek and his uncle set the Argent house on fire, not caring for the consequences. Chris and the Sheriff were the only ones inside. They were down in the basement having a few beers and watching a game on TV. By the time they knew what was going on, the fire had grown too big. They died from the smoke before the flames were extinguished.

Scott told them what had happened and he begged for forgiveness, both for himself and his pack. It was too late. Allison and Stiles were too angry for his words to calm them. That summer, they left together to train so that when their senior year began they could avenge what had happened to their fathers.

Trouble followed them everywhere, but it was in San Francisco that they encountered vampires. There were three of them, a beautiful blonde girl named Rebekah, her brother, Kol, and Kol's lover, Jeremy. The trio didn't seem to be a threat and were only looking for a place to hide and they insisted that the two teenagers help them. Stiles and Allison were reluctant to trust the three of them, but they didn't know how to kill them yet so they agreed to let the vampires travel with them for the time being

They told the vampires their story and the vampires offered to make them make them stronger and help them to get their revenge in return for their help. They knew they weren't strong enough to fight Derek's pack alone and so they took a chance and agreed.

Rebekah made them drink her blood and she snapped their necks before they could fight back. When they woke up, they were thirsty and in a blind frenzy they attacked a homeless man and drank his blood, completing their transformation.

As promised, Stiles and Allison were stronger than ever before. Over the rest of the summer, they learned to control their thirst. When fall came, Kol gave them rings to protect them from the sun. They were finally ready to return to Beacon Hills.

Allison Argent and Stiles Stilinski are ready for revenge.