The Good Sister follows a couple who is working to put their crumbling marriage back together, when the wife receives a letter informing her that she has a long-lost twin sister. First thinking that the new family member will bring … Sonya Walger, Ben Bass, Bobbie Phillips, Ashleigh Harrington, Alarey Alsip, Michael Hearn, Noël Burton Added on Amazon Prime 2021-05-15. Youtube Trailer