MONTREAL - It's a love story with an exceptional soundtrack.

Cradling a 300-year-old wooden instrument, Stephane Tetreault looks at his borrowed cello and says he's well-aware that that he has a little piece of history at his fingertips.

"I still have to pinch myself every few seconds," said Tetreault. "This isn't a reality for me yet."

The 18-year-old musician is holding the Countess of Stainlein, a cello crafted by renowned instrument maker Antonio Stradivari. He said he had an "instant connection" when he first touched the storied cello.

Tetreault got his hands on the centuries-old cello after it was sold at auction last week for slightly more than $6 million. The purchaser has been described as a "patroness of the arts from Montreal" but not much else is known about her.

One thing is for certain: she wanted the Countess to be played by Tetreault. Shrouded in secrecy, the woman saw Tetreault play his cello on TV last year and asked to hear him play.

"Years ago I said that he was going to have access to an instrument like that. I knew I could never afford it, but now he does," said Alain Tetrault, his father.

It's not unusual for musicians to be loaned valuable instruments. Prized cellos, violins and more – often worth millions -- are available to budding players through the Canada Council for the Arts and other opportunities.

There are, however, few teens that have had access to the Countess, which has been played by Italian musician Nicolò Paganini and the acclaimed Bernard Greenhouse.

Given its rich history, Tetreault says he does his best to protect the Countess.

"I have to be extremely careful of course," he added with a chuckle, adding that he's also "very grateful" for the instrument.

The Countess' new life with Tetreault follows the death of its previous owner. The New York Times reports that family members decided to sell the cello after Greenhouse, founder of the renowned Beaux Arts Trio, died last year.

"He has such an intimate link to his violin cello. It's very deep, very sensual and it talks," said University of Montreal music professor Isabelle Panneton.

Tetreault tried the instrument out a few weeks ago at Reuning & Son Violins in Boston and, as he tells it, it was love at first note.

"The first time I put my bow on the string I knew it was the cello for me," he said. "It might sound a bit like a myth but that's really what happened."

Tetreault started playing the cello at age seven when his music teacher asked him to play the cello instead of violin due to a surplus of violinists in the class. He was reluctant at first but says the teacher won him over with the promise of a gift at the end of the year.

It's that decision that eventually led him to the Countess – a centuries-old gift steeped in music history