It's the Summer of 1967. The sun shines brightly over Boundary Pond, a holiday haven on the US-Canadian border. Families relax in the heat, happy and carefree, as hours tick away to the sound of radios playing 'Lucy in the Sky with Diamonds' and 'A Whiter Shade of Pale'. Children run along the beach, and the heady smell of barbecues fills the air.

Zaza Mulligan and Sissy Morgan, with their long, tanned legs and silky hair, relish their growing reputation as the red and blonde Lolitas. Life seems idyllic.

But innocence, like summer, cannot last - and when Zaza disappears, the skies begin to cloud over...

Part literary fiction, part noir, Boundary is a hauntingly lyrical thriller as compulsive as Emma Cline's The Girls.