When Jimmy McMullen, a fireman, is killed in the line of duty, his wife, Jackie, and ten-year-old son, Charlie, are devastated. Charlie idolized his dad, and now the outgoing, curious boy has become quiet and reserved. Trusting in the healing power of family, Jackie decides to return to her childhood home on Sullivans Island.

Awaiting them is Annie Britt, the family matriarch who has kept the porch lights on to welcome them home. Thrilled to have her family back, Annie promises to make their visit perfect—even though relations between mother and daughter have never been what you'd call smooth. Over the years, Jackie and Annie have been known to have frequent differences of opinion. But her estranged and wise husband, Buster, and her flamboyant and funny best friend Deb are sure to keep Annie in line. She's also got Steven Plofker—the flirtatious and tasty widowed physician next door, to keep her distracted.