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: 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.