In Detroit, Sergeant Matthew Gnatek and Officer Nancy Foster are investigating the murder of a soon-to-be father, found shot to death in a deserted field during a snowstorm. With no witnesses and potential evidence disappearing under the blanketing snow, the Crime Scene Unit works quickly with metal detectors, to uncover an item that will put Gnatek and Foster on the trail to meet three young women who each hold a piece of the homicide puzzle.