After fifty years of marriage, Stan and Joy Delaney are ready to start what should be the golden years of their lives. One night a stranger named Savannah knocks on Stan and Joy's door. She says she chose their house because it looked the friendliest. And since Savannah is bleeding after a fight with her boyfriend, the Delaneys are more than happy to give her the small kindness she sorely needs. If only that was all she wanted. Later, everyone will wonder what exactly went on in that house after Savannah entered that night. Because now Joy is missing, no one knows where Savannah is, and the Delaneys are re-examining their family history with fresh, frightened eyes.