Nathan Sexton, 29, head of the Business Intelligence department for Bellhops, goes on a 5k lunch training run on Thursday, February 25, 2016. Sexton was eight and a half months into a fight with brain cancer. He went on to run in the Boston Marathon. (Dan Henry/Chattanooga Times Free Press)

A documentary about Nathan Sexton, a local man diagnosed with stage 4 glioblastoma in 2015, will premiere at The Walker Theatre on Sunday evening.

The documentary, "Keep Fighting: The Journey of Nathan Sexton," was created by filmmaker Greg Corradino to tell Sexton's story and will feature friends and community members talking about his journey, his character and his fight with brain cancer.

"[Corradino] has done an amazing job piecing Nathan's story together and hearing everybody's relationships with Nathan in different ways," Nathan's wife, Elizabeth, said. "It's a really unique way he filmed it, and I think he did a really great job."

Nearly two years ago, Nathan Sexton was working at Bellhops, enjoying the the company's first day at its new office, when he had a seizure. Two more seizures followed before he was able to get to the hospital.

An MRI revealed he had a form of brain cancer that brings an average life expectancy of 15 months.

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Nathan Sexton, a local man battling brain cancer, finished the Napa to Sonoma Wine Country Half Marathon with a 7-minute mile pace on Sunday in California.

It was then that Nathan Sexton began distance running.

"[Running] was a way for me to express some normalcy," he said.

Since his diagnosis, he's run three half-marathons, two 50-kilometer races and two full marathons, one of which was the Boston Marathon. The University of Tennessee graduate and Knoxville native ran track in high school but had never been a distance runner.

"We have Superman living in our town" said Ted Alling, a friend and mentor to Nathan Sexton. "He's a hometown hero. The stuff he's done since he's gotten cancer is mind blowing. I've only seen parts of [the documentary], so I'm excited for it. It's going to be a really special film."

Tickets are on sale at and are $22 in advance or $30 at the door. The event will start at 5 p.m. with a cocktail hour followed by the showing of the film at 6 p.m.

Contact staff writer Mark Pace at or 423-757-6659. Follow him on Twitter @themarkpace and on Facebook at ChattanoogaOutdoorsTFP.