Road sign indicates the way to Cadarache, France the final destination of nuclear shipment. Weapons-grade plutonium is transported from Los Alamos (USA) to Cadarache (France) via several locations for transformation into plutonium fuel or MOX (uranium-plutonium oxide) then destined for shipment back to USA for tests in reactor. Greenpeace shadows the deadly cargo and attempts to block its progress with several actions along the route protesting that the nuclear cargo could be stolen and that an accident during transport would be an environmental disaster.