A renowned nuclear weapons researcher is not only dead -- he's been charred to a radioactive cinder. The incinerated remnants of Dr. Gregory are found curled in the corner of his laboratory at the Edward Teller Nuclear Research Facility near Oakland, California. Since this is a death on Federal property, Mulder and Scully are hastily called in. As FBI agents who specialize in unexplained phenomena, they are the investigators of the X-Files, strange and inexplicable cases which are also mysteries that the FBI doesn't want solved.

Based on the TV series: The X-files.