When Chief of Internal Medicine Dr. Amy Larsen suffers a catastrophic brain injury, her life is turned upside down. Still determined to once again practice medicine, she charts a new path forward, ready to face whatever obstacles stand in her way.

Amy must confront who she has become after the tragedy that struck her family seven years ago. Sonya and TJ disagree on how to treat a sick Marine, and Amy and Jake make a life-changing discovery about an Alzheimer’s patient.

Amy and Sonya endeavor to help a teen in need of a bone marrow transplant and his younger brother whose own health issues jeopardize his disability to donate. Jake deals with a fainting bride and her worried groom. Michael struggles with a secret he’s been keeping.

It’s a race against time as Amy and Jake try to uncover the cause of a unique patient’s worsening condition. Gina treats a quirky hypochondriac, and Amy makes a shocking discovery about her pre-accident love life.

A mass casualty event requires all hands on deck at Westside Hospital. Amidst the chaos, Gina deals with a devastating revelation and Amy’s forced to confront her demons.