Lori becomes distraught when her best friend, Cindy Roth, drowns under mysterious circumstances while on a trip with her husband, Randy. Determined to honor Cindy and learn the truth, she starts to uncover disturbing evidence from Randy's past.

In this exploration of love, commitment, and trust, a long-time couple is forced to navigate the delicate waters of their relationship and the life-changing events they experience over the course of a year.

This drama is based on the true story of a forensic pathologist who made a controversial link between NFL players' concussions and brain disorders.