On the day of the wedding of a medical student with a wealthy plastic surgeon, the families of the young couple realize that the only thing they have in common are secrets and lies. The secrets of both sides will be revealed during the wedding ceremony.
St. Vincent sets out to make a documentary about her music, but when she hires a close friend to direct, notions of reality, identity, and authenticity grow increasingly distorted and bizarre.
It follows a singer-songwriter in a downward spiral as she takes a last effort gig at a motorcycle rally in South Dakota where she meets Casey, a guitarist who walked away from his dream long ago.