A RESEARCH TEAM IS BEING DECIMATED BY A KILLER WHO MAY LURK AMONG THEM -- OR COME FROM THE HEART OF A VOLCANO.
Back at work after her abduction, Scully immediately joins Mulder in investigating a mysterious death at a volcanic research station. Isolated in the trashed station, they must track down a silent killer from the heart of the volcano, which is killing the research team one by one. Suspicion centers on the absent team leader, who claims to have discovered an entirely new form of life in the volcano. But this new life-form has deadly effects on the humans it encounters, and both Mulder and Scully may have been exposed. As time runs out, Mulder must find a missing genius, and Scully must find a way to halt the spread of a killer organism.