Frost investigates a series of break-ins and brutal attacks at the homes of elderly people. He is helped by a female detective, DS Lawson, who also offers him advice on his personal life.

A woman is found in a critical condition in a quiet village on the outskirts of Denton, a victim of an apparent hit-and-run incident. Her husband and daughter are distraught. Frost's investigation exposes the secret life of a corner of rural England.