According to Aztec myths, when one calendar cycle ends and another begins, the time of change comes - and new gods can come to power... Mysticism? But millionaire Riley Steen does not think so, who accidentally got hold of the secret documents of a certain Aaron Baer, who firmly believed that if on the Holy Day of the Aztec calendar a mysterious “summoning ritual” was carried out and a little girl was sacrificed over the mummy, born in due time and in due place, you can summon the cruel god Tlaloc, who is striving for power over the world. Steen, obsessed with the thirst for power, has almost prepared the ritual. However, he is opposed by the father of the kidnapped girl Archie Prescott, the black guide to the Mammoth Caves Stephen Bishop and the mysterious secret society “Seekers of the Way”...