Three bodies discovered. A family obliterated. All evidence seems to point to one murderer: the mother. DC Connie Childs, determined to discover the truth about the fire-wrecked property on Cross Farm Lane, realises that a fourth body - one they cannot find - must hold the key to the mystery. But what Connie fails to realise is that her determination to unmask the murderer might cost her more than her health - this time she could lose the thing she cares about most: her career.