Diane Wilson’s MacBook was stolen from her car Saturday, but it’s not the laptop she’s upset about losing — it’s the priceless contents: a documentary about the two children she lost to a rare disorder.

Wilson was editing a video Saturday of her son Jarrett Gill’s junior high school award ceremony when he asked her to go have breakfast with him and his father. She wasn’t quite done editing and wanted to give Jarrett’s dad a copy of the video, so she brought her laptop and external hard drive in the car, with plans to finish up the video at the restaurant. At the last minute, Wilson decided to leave both in the car inside a silver bag so she could spend quality time with her son during the meal.

But when the three returned to the car, parked on the north side of St. Clair Ave. W. near Dufferin Ave., the bag containing the 15-inch MacBook Pro, hard drive and other computer accessories were gone — stolen.

“I stopped breathing for a while. I just couldn’t believe I’d done something so irresponsible,” Wilson said.

Wilson had been working on a documentary about her two other, now deceased, children: Carling and Colton Gill. All the footage, including interviews with Colton, was on the laptop and hard drive, and Wilson is begging for the return of the irreplaceable videos.

“We wanted to share the story of, really, what it’s like behind the scenes of a special-needs family, some of the challenges, some of the blessings,” Wilson said. “I truly believe that the person who took it probably has a reason … They probably needed it for something. They don’t need the data that’s on it.”

Carling and Colton both had late-infantile neuronal ceroid lipofuscinosis (LINCL), a rare and fatal nervous system disorder. The symptoms, including seizures and gradual loss of vision and motor skills, start appearing in early childhood; life expectancy for children with LINCL is between 8 and 12 years old. Carling died in 2004 at age 8. Colton lived until 15, dying in 2013.

Wilson attributes part of Colton’s longer-than-expected lifespan to a stem cell transplant he underwent in India in 2008, a treatment Wilson said wasn’t available in Canada.

“When we went, [Colton] said, ‘You just don’t take from a country that has so little — we have to give back,’” Wilson said. “We looked at sponsoring health clinics. And my son is fairly ambitious and suggested the number he wanted to sponsor was 283 … It’s a huge undertaking, but he was very clear.”

The documentary, called The Winning Team, was intended as a springboard for the fundraising campaign to make Colton’s goal a reality.

Wilson is offering $500, no questions asked, for the return of the data on the laptop, which has her name and phone number written in permanent ink on the back. After appearing on CityNews, Wilson was contacted by a viewer who matched the amount, bringing the reward to a total of $1,000.

Toronto police, who said thefts from cars are “not uncommon” in the area, are asking anyone with information to call (416) 808-1300 or Crime Stoppers anonymously at 416-222-TIPS (8477).

“I get how people do things for reasons maybe other people can’t understand, but anyone who knew what was on [the laptop and hard drive] would want to return the data,” she said, urging whoever took the MacBook to contact her or drop the data off with media or the police. “I would thank them immensely.”