Amy is married to her dream man. She’s about to wake up.

Amy Taylor thought she knew her husband Craig. A quiet tech expert, devoted father, reliable partner in their suburban life.

But then she finds the photo that changes everything. The image shows a boy identical to their son – but taken at a school he doesn’t attend. Is it possible Craig has another child?

Craig is away on business for the weekend. So Amy has 72 hours to figure out who she’s living with. And it’s so much worse than anything she could ever have imagined.

Yes, he does have a second family. But as she digs further, she realizes that’s the least of her worries.

Because it’s what Craig does on Mondays that is truly terrifying. And the weekend is nearly over.

Will Amy even make it to Monday?