Welcome to the most tumultuous summer of the twentieth century. It's 1969, and for the Levin family, the times they are a-changing. Every year the children have looked forward to spending the summer at their grandmother's historic home in downtown Nantucket. But like so much else in America, nothing is the same: Blair, the oldest sister, is marooned in Boston, pregnant with twins and unable to travel. Middle sister Kirby, caught up in the thrilling vortex of civil rights protests and determined to be independent, takes a summer job on Martha's Vineyard.