Hart Island, off the coast of New York City, is America's largest public cemetery. More than a million people are buried there, among them early AIDS patients, homeless people, immigrants, artists, prisoners, and about ten percent of New Yorkers who died of Covid-19. Hart Island's graves are unmarked, and many who are buried there are shrouded in anonymity. In this series, six of these people’s loved ones go to great lengths to uncover their stories.