Aimless Fear

Aimless Fear is a modern thriller with a supernatural edge. A series of disasters occur.
Sam Diglis, a village bobby with an interesting past has to investigate the deaths and deal with the aftermath.
Common themes emerge, individuals overwhelmed with a nameless fear that causes them to panic and act irrationally, leading in turn to lethal impacts on themselves and bystanders.
Trying to deal with a steady accumalation of widows in the village, Sam comes to realise that each event lies on an ancient ley line, clearly marked by old standing stones and burial mounds.
The mystery deepens when he discovers that each of the vistims had blue eyes.
What is the source of this nameless fear, and can it be stopped?