Derek Hough and his wife Hayley Erbert are making a documentary about their operation

Derek and Hayley Hough have an incredible story of survival to tell.

The married dancers are working on a documentary that takes a look back at the frightening moment Erbert collapsed backstage during their Symphony of Dance tour in December. The documentary, which is not yet distributed, is directed by Jason Bergh and produced by Bergh and Stephan Bielecki.

On Tuesday's episode of Dancing with the starsHough explained how he was waiting on stage for his wife to join him when a stage manager said Erbert was having severe seizures and was “essentially dying.”

Doctors later warned Hough that his wife might not survive her emergency craniectomy, and if she had survived the brain surgery, she might not be the same person, let alone able to walk.

Erbert not only survived the operation, but also made a full recovery. She accompanied her husband on tour again and danced a breathtaking contemporary with Hough on Dedication Night on Tuesday.