Now part of the Bureau of Alien Investigations, tasked with keeping the world safe from extraterrestrials enemies, Rain, Sean, and Stone are sent to suss out a spate of missing persons reports in Chile's Atacama Region. Crossing paths with a sarcastic skeptic searching for his disappeared dad, their exploration of the driest place on Earth soon quenches their thirst for adventure when a sinister subterranean scourge emerges! Alas for Sean, this is one mission that will bug his worst nightmares as the Xplorers gear uo to face the DESERT INTERLOPER!