Vampires. When Peter was a boy he'd thought maybe some day he'd be fighting bad guys. But, vampires? He hadn't seen this bullshit coming. Of course The Company was little to no use when it came to a solution. Day after day he saw news stories of bodies piling up, people laying pitifully in a pool of their own blood deep down some dark alley, then coming back to life later on in the morgue. It sounded creepy, like something out of a Stephen King novel, but after a while the creepiness just seemed to melt into sadness and despair. This wasn't a story. This wasn't a movie or television show. This was real. Once bitten, a person would have just a few short days before they died completely and then just a couple of minutes before the virus brought them back, hungry for blood and able to move at super-speeds. And strength, too. The strength was what helped them hunt other humans and easily win the struggles. Normals were no match for these fiends.
At first he'd wanted to ignore the news of all the deaths and weird stories of people suddenly turning, and tell himself that someone else would take care of this problem. But deep down Peter Petrelli could never ignore a nightmare of this magnitude. The virus was becoming a Pandemic spreading with the help of modern transportation, and soon it was out of the hands of governments and scientists. What could they have done anyways? They'd always been afraid of things they couldn't build up or break down with science. 'One Nation, Under God' would only get you so far when people started ripping out each others throats.
And then there was Sylar. About a year ago Peter had discovered Sylar was his brother. After a few DNA tests and forced-truths from Angela, he was learning how to gradually cope with this fact. It wasn't every day you found out the man you loathed most in the world shared your very existence on a genetic level. It explained a lot, really. They were a bit like yin and yang...dark and light. Opposites in many ways but alike in the rest. Yuck. Peter warmed up to Sylar by force - because it helped him keep tabs on the killer. As it turned out, vampire hunting was a bit of a therapeutic, bonding exercise for the two of them. They both got to take out some aggression and along the way he was helping Sylar realize how good it felt to save people.
With the prodding of their mother and little hope of a bright future if they stuck to slaying in New York City, Peter and Sylar packed up what they could of their things and started a cross-country trek. It was easy enough to take out the vamps with a swipe of telekinesis or swift impalement of a stake. The head and the heart were key. They'd already been down around the Southern states and were making a loop back up the West coast, planning on moving in a spiral pattern until they hit the heart of the country. Then they'd work their way back and head through less-populated areas to clean up more of the mess. For now, Arizona was giving them enough trouble. Vampires were forming groups here, it seemed. Trying to be civilized or something.
"Its fucking hot here," Peter complained, wiping sweat from his brow. He'd just chopped the head off of an elderly vampire who had been begging for his life a minute before. Each kill made his stomach twist into knots but he knew it was for their own good. These people were killing their own family members, for Christ's sake. "I thought they would like colder climates. Guess they adapt." And, sadly, unlike movies and films the sun didn't do much other than make the vampires wince. Hell, one could have a conversation with a vamp without realizing it for a few minutes. These bastards could be tricky.