Southern sisters Mary Alice and Patricia Anne are enjoying their golden years, and these days are better than most. They're spending time with their grandchildren. They're planning Mary Alice's fourth wedding. And they're still having fun solving mysteries, too. So when an Elvis impersonator takes a fatal dive into the band at a local benefit, Mary Alice and Patricia Anne don't need any coaxing to put on their blue suede shoes and set out in search of a killer -- whose next target could be the Southern sisters themselves.