When the fog clears one December morning in Essex, the body of a teenage girl is discovered lying face down in a field.
The victim, Lily Monteith, was murdered in a peculiar and unique way - so unique that it could have only happened to her.
As a result, the case quickly lands on DS Tomek Bowen's desk who, while trying to juggle his newfound life as a single parent to a thirteen-year-old daughter, must unearth the deadly sequence of events and bring the truth to light.
But as soon as the investigation begins, Tomek discovers Lily's death may be linked to a killing spree that has lain dormant for many years - with no one ever being brought to justice for it.
And, if that's the case, he fears another killing spree, this time years in the making, is yet to come.