Venturing into vast underwater graveyards of Maya human sacrifices, journalist and host of NGC’s Don’t Tell My Mother Diego Buñuel searches through a watery maze to unearth new revelations about the most infamous date in the Maya calendar: December 21, 2012 – doomsday. Using ground-breaking National Geographic technology, Diego and a team of archaeologists will literally light up the abyss to explore these underwater tombs and gain key insight into why the Maya may have predicted an impending apocalypse. In a secret location, Diego views a rare replica of one Maya codex whose last page filled with illustrations of floods and ominous-looking gods first sparked the apocalyptic prediction some 100 years ago. And, in remote Guatemala, NGC follows an elite team of researchers who descend through dangerous underground tunnels and, using modern techniques, make a revelatory discovery that may alter our perception of December 21, 2012.