Rob is called out to investigate a series of vandalisms against Lord Ashfordly's new estate manager after he angers the tenants when he employs the hard-line methods he learned in South Africa and raises their rents. Meanwhile, Peggy believes she has found the explanation for David's recent behaviour when she uncovers his strange new addiction.

Rosie is viciously attacked while attending a broken-down vehicle stranded on the moors. When the murdered driver is discovered nearby, Rob and Rachel are determined to solve the mystery when it becomes apparent that the driver was a retired cop turned private detective. Their investigation leads to a chilling discovery linking the case to a religious cult near Aidensfield. Meanwhile, Aunt Peggy buys a flock of turkey's off an old friend, but fails to make any money from them when David grows attached, whilst Carol isn't happy when Rob cancels their first date.