Anna Fox lives alone—a recluse in her New York City home, unable to venture outside. She spends her day drinking wine (maybe too much), watching old movies, recalling happier times . . . and spying on her neighbors. Then the Russells move into the house across the way: a father, a mother, their teenage son. The perfect family. But when Anna, gazing out her window one night, sees something she shouldn’t, her world begins to crumble—and its shocking secrets are laid bare.