Molly Humphreys is the head of the forensic laboratory in the Omega sector. She is loved and respected by her staff and is professional and level-headed. And only when agent Derek Waterman is next to her, Molly stutters and blushes like a schoolgirl. Three years ago, Derek spent the night with her, but then pretended that nothing had happened between them. Molly cannot understand why and is in great pain. One day she is left to work overtime with important evidence that may point to the culprits of the crime. At night there is an explosion in the laboratory. Derek learns about the death of a person and decides that it was Molly.