Meredith Maggs hasn't left her house in 1,214 days. But she insists she isn't alone.

She has her cat, Fred. Her friend Sadie visits when she can. There's her online support group, StrengthInNumbers. She has her jigsaws, favourite recipes, her beloved Emily Dickinson, the internet, the Tesco delivery man and her treacherous memories for company.

But something's about to change.

First, new friends Tom and Celeste burst into her life. Then an estranged sister she hasn't spoken to in years.

Suddenly her carefully curated home is no longer a safe place to hide.

Whether Meredith likes it or not, the world is coming to her door . . .