Take Me to the River (movie) 50%

Family reunion.  MC (Rider) goes off with little girl to a barn. She starts screaming and runs out of the barn with blood on her dress.  Her first period? Did Rider assault her.  Family in Nebraska is already suspicious of Rider and his family because they are the "California" relatives. Rider is not midwestern in any way, wearing too-short shorts, star sunglasses. He's also interested in art--nothing like his cousins who are suspicious, contemptuous, and mystified by him.  Rider's mother has some beef with her brother, and there is the hint that Rider's father is not actually his father.