There comes a time in every life when we need to overcome, persevere, heal.

Sometimes the healing is physical, sometimes it's more than that. Always it's the result of determination and help. In this series, you'll find stories of people who've overcome adversity, setbacks and difficult times. There are many ways to heal. We're pursuing them all.

WATCH: EVERY MOMENT

Stacey Valentine, MD, is a Harvard-trained pediatrician at UMass Memorial Health’s pediatric ICU. When she received a breast cancer diagnosis, she chose to stay in Worcester for treatment, and that has made all the difference.

WATCH: THE IRON MAN

Marc Saucier has competed in hundreds of triathlons, ski races and other events over the last three decades – including 15 Iron Man triathlons. Chronic pain in his hip and knee tried to bring that to an end. Thanks to UMass Memorial Health, Marc is getting back on course.

Watch: Out of the Blue

Mariella Fernandez-Davila was young, active, athletic. You would never know that a malformed blood vessel lurked in her brain, simply waiting to rupture. When it did, it took two hospitals, a LifeFlight team and the weight of the entire UMass Memorial Health team to save her life.

Relentless. It means everything.