Two houses, hundreds of miles apart . . . yet connected always.

When life throws Molly Butterfield a curveball, she decides to spend some time with her recently widowed granddad, Wally, at Hawthorn Place, his quirky Victorian house on the Dorset coast.

But cosseted Molly struggles to look after herself, never mind her grieving granddad, until the accidental discovery of an identical Arts and Crafts house on the Norfolk coast offers her an unexpected purpose, as well as revealing a bewildering mystery.

Discovering that both Hawthorn Place and Acacia House were designed by architect Percy Gladwell, Molly uncovers the secret of a love which linked them, so powerful it defied reason.

What follows is a summer which will change Molly for ever . . .