Mayme Holloway knows how to keep secrets. Wounded outlaws often call on her medical skills and trust her silence. When Charley Floyd and his wife pay their old friends, Mayme and O.C., a visit, everything changes. Charley, aka Pretty Boy Floyd, is wanted for killing a lawman. His wounds require more help than Mayme can provide, which forces her to break her silence and seek help from Dr. Joe Stern.