A tense psychological thriller.
It wasn't the easiest way to commit suicide. But Marie Tennent seemed to have just curled up in the freezing snow on Iron Tongue Hill and stayed there until her body was frosted over like a supermarket chicken. And hers isn't the only death the police have to contend with either - not after the discovery of a baby in the wreckage of an old Air force bomber, and the body of a man dumped by a roadside.
As if three bodies on her hands isn't enough, snow and ice have left half of "E" Division out of action and Diane Fry is forced to partner DC Gavin Murfin. She and Ben Cooper were never a match made in heaven, but next to Murfin, working with Ben starts to look like a dream.
He's on a trail of his own, though - and one as cold as the Peak District January. In an equally bitter winter in 1945 an RAF bomber crashed on Iron Tongue Hill killing everyone except the pilot, who walked away and disappeared. Now his granddaughter, Alison Morrissey, is in Derbyshire desperate to clear his name, and Ben can't help taking an interest.