The next morning, Dean and Sam are at The Golden Café, as they are eating, a man walks up to their table.
"Dean, Sam Winchester, I'm Jonathan," he stated shaking both of their hands as he took a seat next to Sam.
"What is this all about?" Sam asked.
Jonathan took out a file, and opened it for the brothers.
"Four an a half years ago your father asked me to look for this girl," Jonathan replied showing Dean a picture.
Dean took the picture from Jonathan.
"Look who is it," Dean noted turning the picture to his brother.
"Why was our father looking for Kate?" Sam questioned.
"Katherine Davis is your sister," Jonathan answered.
"What!" Dean shouted.
"Your father wrote these letters, one is for you boys, and one is for Katherine," Jonathan responded, "I've got another case and I have to go, you guys can keep the file, and read that letter John said it would explain."
Jonathan left the café, as Dean and Sam continued to look for the papers.
"I don't believe this," Dean yelled out.
"What does the letter say?" Sam asked.
Dean opened the letter and began to read, "Boys, you just found out that you have a sister and I am writing you this letter to explain. The day Sam was born, Mary had twins, and when your sister was born, we were told that she died. Four and a half years ago, I had a run in with Azazel, and I found out that your sister was alive and well. If you are reading this letter, this means I was not able to tell you myself. Take care of her and yourself.
Dean got up from the booth and threw money on the table.
"Where are you going?" Sam questioned his brother getting up himself.
"I'm going to get our sister," Dean answered angrily.
Dean stormed out of the café; Sam put the file together quickly and ran after his brother. Meanwhile, an older man and woman are in a house.
"We have a problem Java," the woman uttered in urgency.
"What's wrong?" Java asked.
"The Winchester boys are in town, and they made contact with Kate," the woman replied.
"We leave tonight," Java stated as his eyes turned black.
As this occurs, Dean and Sam drive up to a park.
"Do you see her anywhere?" Dean questioned as he turned off the car.
"No… Wait, over there Dean," Sam pointed out.
The brothers got out of the Impala and started to walk towards Kate. Meanwhile while Kate is taking pictures, she began to hold her head in pain. A vision flashes of Dean, Sam, and Kate in a burning building. When Kate comes to she sees Dean staring at her and realizes Sam is holding her from falling.
"Are you okay?" Dean asked, helping her stand.
"Yeah, thanks," Kate responded, she looked at her watch for a moment, "I am so sorry, but I gotta get these pictures back, see you guys around."
Kate walked away, Dean looked at his brother.
"Was that? Dean began to question.
"She just had a vision?" Sam acknowledged, finishing his brother's sentence.
"I guess she's your twin after all," Dean stated with a smirk.
"You know Dean, we still need to take care of the Wendigo," Sam explained.
"Okay, we take care of the creature tonight, and deal with the family issues later," Dean agreed walking away.
"Where are you going now?" Sam asked following his brother.
"We need a few supplies." Dean explained as he reached the car.
Later that night, Dean and Sam drove up to the bar, Dean turns off the car, and the guys went to the trunk of the Impala. Dean took out a flashlight and handed it to his brother. Just than the heard a scream.