Hunter Shamatt had just arrived in Las Vegas when he realized his wallet was gone. It contained $60, a $400 paycheck, his bank card and his identification card.
He was stressed and upset, but it was his sister's wedding weekend, and he didn't want to make a big deal of it. He borrowed money from his parents for the weekend.
"It kind of sucked," said Shamatt, 20, who works as a carpenter. "I was anxious not having my ID."
He thought maybe he lost it on his Frontier flight from Omaha to Vegas, so he called the airline and reported it missing. No luck.
"It being Vegas and all, I figured it was gone forever," he said.
After the wedding weekend, he and his parents headed to the airport to fly back to Omaha on Nov. 11, a three-hour drive from their home in Brandon, South Dakota.
His mother was worried about her son's identification. She didn't even know if he'd be allowed on the flight home without it.
"We were very anxious," said Jeannie Shamatt. "I was worried. I was anxious. He was anxious."
In the end, after an interview that lasted about an hour, he was allowed on the flight.
The following day, a package arrived at his home.
It contained his wallet - completely intact - with a note that said:
"Hunter, found this on a Frontier flight from Omaha to Denver - row 12, seat F wedged between the seat and wall. Thought you might want it back. All the best."
And an additional message:
"P.S. I rounded your cash up to an even $100 so you could celebrate getting your wallet back. Have Fun!!!"
It took Hunter Shamatt a moment to process the note.
"No way, no way," Shamatt remembers saying. "That can't be. No way, just no way."
He counted the money three times, his mother said.
"Everybody was so excited, none of us could believe it," she said. "It was absolutely amazing."
They both wanted to thank the kind stranger, so Jeannie Shamatt posted a picture of the note on Facebook with a message asking for help finding the kind stranger. It got thousands of likes, shares and comments.