On Christmas Eve, 1975, Dan Fogelberg's mother ran out of whipping cream for her Irish coffee.

It was the smallest errand imaginable. Dan offered to go. He drove through the snow to the Convenient Food Mart on Abington Hill, one of the only stores still open in Peoria, Illinois, on Christmas Eve, walked through the door, turned down the frozen foods aisle, and stopped.

Standing right in front of him was the girl he'd loved in high school.

Dan Fogelberg was born in Peoria in 1951, the youngest of three sons. His father Lawrence was a high school band director, the kind of man who fills a room with music before anyone even notices it's happening. Dan inherited that gift early. He taught himself guitar and piano as a kid, formed his first band at fourteen, and left home for Colorado and California in his early twenties, slowly building the career he'd always been certain was waiting for him.

Before any of that, there was Woodruff High School. And Jill Anderson.

They dated through high school, class of 1969, driving back-country roads together, talking about everything the way teenagers do when they still believe the world is wide open. He was already writing songs. She was the person he wrote them about. It was the kind of first love that feels permanent right up until the morning it isn't, and once they graduated and headed off to separate colleges, distance did what distance always does.

She married. Moved to Chicago. Built a life with nothing to do with back-country roads in Peoria.

He moved to Colorado. Built a career. Released gold and platinum albums through the late 1970s.

Neither had any reason to think their paths would cross again.

Then came that Christmas Eve.

He recognized her instantly. She turned and saw him too. And there, under the fluorescent lights of a convenience store at 1302 East Frye Avenue, snow falling outside and two families waiting at home, they stood looking at each other across six years of lives lived apart.

They wanted to keep talking. They went looking for an open bar. Every bar in Peoria was closed on Christmas Eve. So they bought a six-pack, Olympia beer, from a liquor store down the street, and sat in a car in the cold talking until there was nothing left to say but goodbye.

She told him about her marriage, her life in Chicago. He told her about the music, the road, the career just beginning to take shape. The conversation had that particular texture of two people who once knew each other completely, now performing a careful version of themselves for a stranger who used to be home.

He wrote every word of it down.

Five years later, Same Old Lang Syne was released as a single and climbed to number nine on the US charts. It became one of the most-played songs of every American December, the one that captures loss without tipping into tragedy, nostalgia without turning sentimental. A man. A woman. A grocery store. A car. A six-pack. Snow.

Dan took artistic license in two small places. In the song, her eyes are blue. They're actually green. He later told her blue was simply easier to rhyme. And the song describes her husband as an architect. He was really a PE teacher, a detail Dan almost certainly never knew.

Everything else happened exactly as written.

When the song first came on the radio while Jill was driving to work, she recognized herself in the opening verse. She turned up the volume. She kept driving.

And then she said nothing.

Not to her friends. Not to her husband. Not to anyone. Fogelberg confirmed in interviews that the song was autobiographical, but refused every time to name the woman. She understood exactly what he was doing and matched his silence. She didn't want to resurface into his life. He'd married three times by then. She had her own life to protect. The line she's never spoken about publicly, "She would have liked to say she loved the man, but she didn't like to lie," sat right there in the song for anyone to hear.

She was already divorced by the time it came out.

Years passed. She eventually attended one of his concerts and found him backstage. They spoke briefly, two people in their forties who'd once sat in a cold car on Christmas Eve talking about everything they'd become. She later became a teacher in Missouri. He kept writing, kept recording, kept his promise about her name.

In May 2004, Fogelberg was diagnosed with advanced prostate cancer. He announced it publicly and urged every man over forty to get tested. He spent three years fighting it from his home in Deer Isle, Maine, with his wife Jean by his side.

He died December 16, 2007, at fifty-six.

Six days later, Jill Greulich, formerly Jill Anderson, Woodruff High School, class of 1969, spoke to the Peoria Journal Star for the first time. She confirmed everything. The store. The car. The cold. The six-pack. The conversation about who they'd each become.

Two corrections. Green eyes. PE teacher.

"I'll always have a place in my heart for Dan," she said. "He would be a very special person to me, even without the song."

The street where the store once stood is now called Fogelberg Parkway.

Every December, the song still plays on radios across America. People hear it in cars and grocery stores and quiet kitchens, and think of someone they used to know, some version of themselves from a back-country road a long time ago. They feel that particular ache of a life that split at a junction they can no longer find on any map.

They never learned her name.

He made certain of that.