The Couple at Number 9

When pregnant Saffron Cutler moves into 9 Skelton Place with boyfriend Tom and sets about renovations, the last thing she expects is builders uncovering human remains. The remains of two bodies, in fact. Forensics indicate the bodies have been buried for at least thirty years. Saffy has nothing to worry about until the police launch a murder inquiry and ask to speak to the cottage's former owner. Her grandmother, Rose. Rose is in a nursing home and Alzheimer's means her memory is increasingly confused. She can't help the police, but it's clear she remembers something. As Rose's fragmented memories resurface, and the police dig ever deeper, Saffy fears she and the cottage are being watched. What happened thirty years ago? Why did no one miss the victims? What part did her grandmother play? And is Saffy now in danger?