Bitter orange

From the attic of Lyntons a dilapidated English country mansion Frances Jellico sees them--Cara first: dark and beautiful then Peter: striking and serious. The couple is spending the summer of 1969 in the rooms below hers while Frances is researching the architecture in the surrounding gardens. But she's distracted. Beneath a floorboard in her bathroom she finds a peephole that gives her access to her neighbors' private lives.