After talking to Max the siblings went to the home where the man lived. George Phelps who sat in seat 20C right in front of Max. They talked to the man's wife, asking her if she notice anything different about her husband before he went to the airport. But the only thing that she said was that he was scared of flying and that he had acid reflux as if that was something out of the ordinary. But there was something that bothered Isabelle about this case, she kept racking her brain about it and just like always nothing would come up. She felt that it's on the tip of her tongue and that it's in her memory of what this case could be. As soon as her older brother made the comment that since George's wife wasn't any help they need to go check out the plane. Smiling at her brothers Isabelle ran to the driver's side and told her brothers to hop in.

Taking the directions from her older brother Isabelle made her way to the NTSB warehouse. Letting her brothers out at the front door their sister told them to make sure they look everywhere and that she will be waiting for them near the back. As her brothers went in the warehouse Isabelle read their dads journal in hopes that she can find something. But the only thing she did find was a few prays in Latin that she took two to three years to learn all of Latin. Along with other monsters that she has and hasn't fought but the thing that caught her attention the most was the Demon. She only hunted one once and after that John never let his children hunted them again. She read over the entry and tried to match the two up, she knew that Dean always carried Holy Water and a few other things for Demons so many this could be one of those cases.

Reading one of the prayers and saying it under her breath to see if she remembers the words in English. Maybe her brothers will find something in the warehouse that will lead them in the direction. Taking a look up from the journal when she heard a car pull up Isabelle saw two men in black suites walk towards the door. Her eyes widen at the sight and started to car knowing her brothers will be out anytime soon. When the siren turned on her heart started to race, placing the car in drive and holding it down with the brake she looked behind her and saw her two brothers running towards her. Yelling at them to hurry up Isabelle hit the gas pedal as soon as her brothers got in the car. Speeding out the parking lot while squealing the tires Isabelle speed down the road.

As she slowed down and went the speed limit Isabelle asked her brothers if they found anything. Sam showed her the bag that had some yellowish white powder in it, asking what it is Dean only told her to head back to Jerry's. Doing as she was told Isabelle turned the car onto another street and headed back to the place Jerry worked.

Walking into the building with her brothers on both sides Isabelle felt the eyes of the males that worked there. Only smiling at some of them Isabelle and her brothers walked into the small office where Jerry looked up with a shock expression. Sam handed him the bag and told him that he and Dean found it on one of the piece of the plane. Jerry looked at them and took the bag from Sam's hand. Dumping out the powder on a micro glass slide and placing it on the microscope, Jerry turn on a computer screen. Seeing the powder up close Isabelle looked at it hoping whatever it is will come to her. As Jerry looked at it the siblings watched him and tried to think of what it could be.

"This stuff is covered in Sulfur." Jerry said causing the siblings to look at each other.

"You're sure?" Sam asked, Isabelle racked her brain for anything that has to do with Sulfur.

"Take a look for yourself." Jerry replied moving out of the way and walking out the door saying something about having to fire somebody.

"Not too many things leave behind a Sulfuric residue." Dean said after he looked. "Demonic possession?"

"It would explain how a mortal man would have the strength-" Sam started

"To open up an emergency hatch." Isabelle finished for him. Dean looked at them and wondered if they was possession or something since they are always finishing each others sentences.

"If the guy was possessed, it's possible." Sam said looking at his siblings.

"This goes way beyond floating over a bed or barfing pea soup." Dean said standing straight. "It's one this to possess a person, but to use them to take down an entire airplane?"

"You ever heard of something like this before?" Sam asked looking at Isabelle and Dean. The two shook their heads.

~;)~

Sitting in the motel room with many papers around her on the bed Isabelle read up on plane crashes. While her twin sat on his laptop searches up things about Demons while their older brother searches through books that they had borrowed from the library. Not finding anything that seems to match what they are looking for Isabelle threw the papers and laid back on the bed letting out a loud groan. As she was about to say something Sam started to talk about how every culture around the world has their view of a Demon and a Demon possession. But none of them seem to talk about the case they are working on, is what Dean said. However, Sam proved him wrong when he went on about the Japanese believing that certain Demons are behind certain disasters, both natural and man-made.

Isabelle got up from the bed and read the webpage that her twin has on his computer. Seeing a website that talked about Demons and the cultures that some of them are in Isabelle patted her brother on the shoulder. As her brothers talked about the Demon Isabelle took Sam's laptop and did a little bit of her own research about the Demons. When Dean stops talking Isabelle looked up to see him walking away. Looking at her twin then back to her brother she heard Dean say that this ain't one of their normal gigs. Demons don't want anything but death and destruction for their own sake. Hearing her older brother say that he wishes their dad was there Isabelle looked at him with sad eyes. At the same time the twins agreed with him and went back to what they was doing.

When the cell phone began to ring again Isabelle didn't dive for it like she normally does which cause Dean to look at her. But when he saw the tears she is hiding and not letting fall Dean picked up the cell. When Dean said Jerry's name it caught the twins attention, something must have happen again if his calling them. Seeing the look on Deans face the twins knew their theory is right, something just happen. Getting up and walking towards the door Isabelle waited for her brothers to get moving, a plane must have went down again. And this time there were no survivors.

Seeing black smoke rise in the hair and a sign that says Nazareth 3 Isabelle let a small laugh out at the irony. Flashing badges to the police officers at the scene the siblings looked around, Isabelle found some of the parts of the plane and took a closer look. Finding the same yellowish white powder Isabelle took her pocket knife and scrubbed it off into a small bag. Dean took his home made EMF reader and walked around the plane getting the same thing he did at the warehouse Dean called his brother over. Sam did the same thing his twin did and called her over telling her they are leaving. As they walked off the scene Isabelle told her brothers what she found, Sam showed her his own bag with the same powder.

Once again they are in Jerry's office for the third time that day. This time the boys are back in their normal clothes and feeling more comfortable. Jerry did the same thing he did the first time, poured the powder on the slide and compared it to the last slide. Asking if it was Sulfur Jerry nodded his head; Isabelle made the comment that's wonderful. Jerry looked at her while Sam only rolled his eyes at his twin. Dean went to say something that had to do with the crashes but got cut off by Isabelle who went to say that the Demon must be after Chuck since he was involved in two plane crashes. Sam said that it's good news, but bad for Chuck. Hearing the way Sam said it Dean knew that there was something else to it. So Dean asked what the bad news is; with the planes that Chuck went down was in the air for only forty minutes. Dean's eyebrows went together as Isabelle crossed her arms and started to think. Thinking about the time Isabelle started to notice the meaning, Jerry asked about it which Isabelle gladly answered for him. A biblical numerology, Noah's Ark it rained for forty days, the number means death.

Walking over to behind her twin Isabelle read the article that Sam has pulled up. Reading that there has been six plane crashes over the last decade that all went down exactly forty minutes in. And when her older brother asked about any survivors the twins only answered with a no. Sam and Dean talked about the voice said there will be no survivors so it's going after the ones that had survived the crash. With this news Isabelle looked at her brothers as the oldest said that the demon is trying to finish what he started in the beginning. Telling Jerry they will see sometime later the siblings walked out of the office. Jerry ran after them and asked where they are going, Isabelle turned around while walking backwards and only replied that they are going to stop it. Jerry smiled at them and told them goodbye.

~;)~

Back in the car as Dean drove down the road just as the sun was about to finish setting Sam and Isabelle called the survivors. Acting as they are taking surveys for their airline Sam got off the phone with the last survivor. Isabelle hunged up with a man named Blaine Sanderson while her twin got off the cell with Dennis Holloway they said at the same time that they will not be flying anytime soon. Dean made the comment that their only wildcard is the flight attendant Amanda Walker. Sam had called the woman to see if she was flying any time soon and her sister, Karen, said that her sister's flight leaves Indianapolis tonight at eight. Isabelle also put it out there that it's her first night back on the job after the crash. Hearing this Dean pushed down the gas pedal in hope to get to the airport in time.