Rosie and Chad Lowan are barely making ends meet in New York City when they receive life-changing news: Chad’s late uncle has left them his luxury apartment at the historic Windermere in glamorous Murray Hill. With its prewar elegance and impeccably uniformed doorman, the building is the epitome of old New York charm. One would almost never suspect the dark history lurking behind its perfectly maintained facade.

The perfect neighborhood can be the perfect place to hide… Who wouldn’t want to live in Brighton Hills? This exclusive community on the Oregon coast is the perfect mix of luxury and natural beauty. Stunning houses nestle beneath mighty Douglas firs, and lush backyards roll down to the lakefront. It’s the kind of place where neighbors look out for one another. Sometimes a little too closely…

Kit Darling is a maid with a snooping problem. She’s the “invisible girl,” compelled to poke into her wealthy clients’ closely guarded lives. It’s a harmless hobby until Kit sees something she can’t unsee in the home of her brand-new clients: a secret so dark it could destroy the privileged couple expecting their first child. This makes Kit dangerous to the couple. In turn, it makes the couple—who might kill to keep their secret—dangerous to Kit.

Welcome to Stanhope. A safe neighborhood. A place for families. William Wooler is a family man, on the surface. But he’s been having an affair, an affair that ended horribly this afternoon at a motel up the road. So when he returns to his house, devastated and angry, to find his difficult nine-year-old daughter, Avery, unexpectedly home from school, William loses his temper. Hours later, Avery’s family declares her missing. Suddenly Stanhope doesn’t feel so safe. And William isn’t the only one on his street who’s hiding a lie.

"You need to kill at least three people, right? So that's what I'll do." When Will jokes about becoming a serial killer, his friends just laugh it off. But Adeline can't help but feel there's something more sinister lurking behind his words. Fifteen years later, Adeline returns to Blythe for a reunion of the old gang - except Will doesn't show up. Reminiscing about old times, they look up the details of his supposed murder spree. But the mood soon changes when they discover two recent deaths that match.