In 1947, a second UFO crashed, near the Los Alamos nuclear plant. At this time, beings from other worlds took great interest in the growing nuclear arms race. This interest may have led to the crash and recovery of two ships, in the area. Investigators found beings of non-human characteristics; some dead and others wounded but still alive. In addition, materials were found that left the witnesses stunned. Jaime Maussán travels to the places of these crashes to interview the renowned Donald Schmitt, who interviewed more than 150 direct and 600 indirect witnesses.