In 1951, Miranda Schuyler arrives on the affluent and secretive Winthrop Island, navigating a new world of wealth and class after her mother's remarriage. She soon finds herself entwined with Isobel, her new stepsister, and Joseph Vargas, the son of the lighthouse keeper. As the summer unfolds, a tragedy tears the island's social fabric apart, leading to Joseph's wrongful imprisonment for murder. Nearly two decades later, Miranda, now a famed Shakespearean actress, returns to Winthrop Island on a quest for justice. Amidst the unchanged facade of the island, power dynamics have shifted, and Miranda must confront the complex web of secrets that once drove her away in her pursuit to exonerate the man she once loved.