Eleanor Rawlins is an unworldly loner, who would rather be climbing than thumbing an IPad.
A teacher is found dead in the woods. Is it suicide or murder?
It's too late for DI Irene Nicholson - retirement is due.
But she can't let go.
She revives her old partnership with ex-DI Fletcher to uncertainly follow the flimsiest of tenuous clues, driven only by their sceptical curiosity and the haunting premonition of another teenager.
'I've seen it . . . there are big hills on either side.
It's cold.
Blue sky.
Eagles floating high up.
There's a lake.
The wind is blowing.
The girl is walking towards you.
She's not well . . . something terrible has happened . . . her eyes are . . .'
Terrible crimes were committed in the 1980s . . . by people in positions of trust and authority.
How much longer can they be kept secret?