(A/N: Hey everyone; just thought you guys would enjoy an additive of a new story to this site. And aren't ghost stories ALWAYS the way to go? Anyways, enjoy this crossover fiction, for both Teenage Mutant Ninja Turtles and Ghost Adventures are near and dear to my heart.)

Chapter One

It all started on a dark night, sometime during that particularly cold winter. The boys stayed inside for most of the season, only going out when they felt it necessary. But something brought them out that night; a force much greater than themselves.

The night was a particularly stressful one; the brothers found themselves stranded in the outdoors, as several feet of snow hit within hours, surely a record in New York. Their only way home was covered, and they weren't going to resort to swimming through the icy waters to make it back. The brothers squatted on top of a long-abandoned building, brainstorming.

"Can't we just go to April's?" Mikey complained, rubbing at his arms to try to gain some type of warmth. They didn't expect so much snowfall; they were only clothed in thin jackets. Leo shook his head.

"She's out of town. It would be rude to break in. We need to stay somewhere warm for the night." His brothers exchanged glances. "Ugh… I guess we can call her and find out." Mikey broke out into an immediate grin. He pulled out his cell, dialing in the familiar digits, before waiting for his friend to answer; that is, until a continuous beeping tone hit his ears. He frowned. "I'm sorry, guys… She's not picking up. Let's get somewhere warm, and we'll try again."

"How about in the building we're on? It's been abandoned since around the 1980's… I'm sure it's better in there than out here." Don offered, and Leo led his brothers to the edge of the building; where Raph helped his brother yank open a rusty window. Once their older brothers entered the structure, Don and Mikey exchanged a nervous glance before climbing in as well.

The room they entered was pretty well heated; it was almost as if someone was already inside. Leo listened closely for any movement, but the wind outside was too loud to decipher any type of sound in the abandoned facility. He knelt down, gently taking a small doll into his hand.

"What did this place used to be?" He whispered, not even expecting an answer. Raph and Mike look to their ingenious brother in purple.

"It used to house some of the mentally ill. It actually was a branch off from the hospital, but was shut down in 1987, due to malpractice." Don explained, eyeing the small doll in his eldest brother's hands warily. Raph eyed his brother, his eye contact sending his question subconsciously. "They… They used to beat the patients. They went under investigation, after a patient went missing. They ended up finding the girl in the basement. She… She was strangled to death… And they kept it a secret because their head nurse practitioner was the one who murdered her. At least, that's what everyone thought. She was only ten years old…" Leonardo's expression hardened as he stood; still grasping the doll in his hand.

"Let's… Let's figure out what we're doing for the night." He spoke, before tucking the small toy the pocket of his jacket. The little black hairs, made of yarn, still peeked out slightly. "So, who wants to try their luck calling April again?" Raph pulled out his phone, trying yet again, but cursing as he failed to get a hold of the woman. The brothers each took a seat around the corners of the room, but Leonardo remained at the window, keeping watch and keeping himself at ready in case of attack or intrusion.

"So… How exactly are we supposed to get home anytime? Won't the snow stay for a while?" Mikey asked, twiddling his thumbs as he was forced to wait.

"I say we just head over to April's. She'd understand…" Raph spoke, before a loud thud was heard. Everyone stood, and Leonardo even cautiously kept his hand near the hilt of one of his swords. He motioned for his brothers to stick to the shadows. They listened once more, but heard nothing. The brothers relaxed slightly.

"Must've just been something to do with the weather. We should be fine." Don assured his overprotective oldest brother, who nodded, but retained his position as the guard. Mikey started to shake, and it finally caught their attention.

"What the hell is wrong with you?" Raph interrogated, his arms crossed in discontentment. The youngest brother surprisingly broke out into a grin.

"Well… Haven't you heard? This place…" He paused, looking to all of his siblings with an excited gleam in his eye. "It's haunted." The brothers exchanged glances, before Raph burst into a sarcastic, rich laughter.

"Funny, Mikey. Real funny." Mikey's expressive blue eyes widened.

"No, really! It hasn't been investigated or anything, but it's supposed to be the most haunted place in all of New York!" Don offered Mikey a sympathetic glance, but spoke of nothing. Mikey sighed. "I'm telling the truth, guys…" Leonardo approached his youngest brother, taking on his protective duty of comforting his innocent mind.

"Mike, you have to let people believe what they want to believe. I'm not saying that what you're saying isn't true… But you have to allow Raph to believe what he wants to believe." He informed the non-tainted soul of his brother. Mikey nodded, allowing his brother to deliver a comforting pat to his shoulder before returning to his vigil at the window.

The building remained silent, and the brothers sat there basking in it. Leonardo kept his ears perked, as his brothers got comfortable, and tried to remain warm. After about an hour of them being in the building, the eldest was about ready to join his brothers and ease his guard status if only by a little bit.

But then, he heard a noise. It sounded like a voice; and a few footsteps followed it, heading in their direction. He looked to his brothers, who were blissfully ignoring the noises he heard; it was almost as if he had imagined the vibrations in the building. He wasn't about to relinquish his sudden intensity, that must've shown on his face.

"Leo? What's wrong?" With those words, all eyes were on him, and his uneasy eyes that were fixed on the doorway.

"I'm not saying that there are or aren't any ghosts in this building…" He started, his hand settling on the hilt of his weapon once more. "But we are definitely not alone in here." His brothers exchanged glances, before turning to him once more. "Listen." He ordered, allowing his brothers to examine the silence around them. After a few minutes of quiet, Raph rolled his eyes.

"Leo, seriously; there is nothing in here besides…" The hotheaded brother was cut off by loud footsteps approaching on the floor the room resided on. The four brothers seemed to hold their breath, as the footsteps came even closer.

"Is anyone here?" The voice on the other side of wall spoke. "What was this room used for?" They heard a male in the room beside them. Mikey's eyes were filled with worry and fear, as were Donatello's. Raph's eyes mirrored Leonardo's; he was ready to fight if needed. "How about…" The voice paused, as it finally placed itself directly in front of the door that the turtles were residing in. Leonardo's eyes narrowed. "Why isn't this door opening?" The voice murmured, before he began to press weight against the structure. Leonardo's hand was firmly grasping one of his swords at this point, as he placed himself in front of his siblings; in the forefront of danger.

Then, the door opened.

It was chaos; if only for a few seconds. A green and red blur shot out in front of the eldest turtle who called out in protest. But it was too late.

The mysterious figure who had placed fear in the hearts of the brothers was laid out on the ground, completely unconscious from two blows by a hotheaded Raphael. The first hit, a punch, landed on the man's nose, and the second hit, a blunt blow by the hilt of the red banded turtle's sai connected at his jaw.

Then, the four brothers stood over the figure in shock of what had just occurred; had the man even been a reason to feel endangered? Did they just come to blows with a figure who hadn't even been interested in harming them?

"Oh no… Dudes; we just made a big mistake." Mikey warned. Leonardo glanced from the unconscious man, back to his youngest brother.

"What do you mean, Michelangelo?" The leader questioned, wary of whatever his brother was ready to say. Donatello seemed to be on the same track of mind as his orange masked brother; as he let out a small gasp. "What is the matter?" His jaw clenched.

"Leo… This guy… Isn't just some random guy." Don started, but his excitable younger brother cut him off.

"He's Zak Bagans from Ghost Adventures!" Michelangelo exclaimed. Leonardo and Raphael exchanged a look of confusion to one another. "He's famous, bro!"

Suddenly, this mysterious figure was looked at in a much, much different light. And Leo couldn't help but agree; they had made a mistake.