In Chicago, Marissa Irvine arrives at 14 Arthur Avenue, expecting to pick up her young son Milo from his first playdate with a boy at his new school. But the woman who answers the door isn't a mother she recognizes. She isn't the nanny. She doesn't have Milo. And so begins every parent's worst nightmare.

Cast: Sarah Snook, Jake Lacy, Sophia Lillis, Michael Peña, Dakota Fanning, Abby Elliott