Dig Deep for Murder by Kate Kingsbury is book 4 of the Manor House mystery series set in the English countryside during WWII. Lady Elizabeth Hartleigh Compton is a widow, an orphan, Lady of the Manor...and nearly broke. She juggles bills, tries to keep the manor house from falling apart, lives frugally with 2 elderly servants: Violet, housekeeper and Martin, butler. Elizabeth can't afford a car, so she rides a motorcycle when she travels into the nearby village, Sitting Marsh.
Polly, a village girl, started work at the Manor as housemaid. Since her crush on Sam, an American airman, Polly has shirked her cleaning duties in favor of work in Elizabeth's office. To impress Sam, she claims to be Elizabeth's secretary. Polly lied about her age when she met Sam, certain he would not date her if he knew the truth. Recognizing that Polly shirks her cleaning duties, Elizabeth agrees to hire a housemaid from London - to Polly's great joy.
Besides housing American airmen in the east wing of the Manor House, Elizabeth designated part of her land to be a Victory Garden tended by villagers. When Polly's family take over an unused plot, they find a dead body. The man's face is battered, so he is identified by his clothing. Elizabeth goes to Sitting Marsh to break the news to his wife. She's surprised at the woman's lack of grief.
George and Sid are the village constables. They retired years ago, only grudgingly serve in the absence of all the village's young men. They protest when attending a crime scene interrupts a meal. They certainly don't care to investigate a missing renter for Elizabeth. She absolutely needs the rent, so she must do the sleuthing herself.
Elizabeth eventually links the widow's lack of grief, the dead body, and missing renter. She figures out what really happened, and chases down the killer - alone.