Having penetrated a burial sanctuary hidden in a cave in the wilds of the Rocky Mountains, two young people break an ancient curse, and this triggers a chain of catastrophic events that threatens the very existence of humankind. In this cave, next to the remains of strange white-skinned Indians, lies a multitude of golden plates inscribed in an unknown language—as well as the sacred totem of this people: the skull of a saber-toothed tiger. Inside it is a mysterious substance which, once set free, instantly begins to consume the surrounding matter, turning it into dust—and the process cannot be stopped. A special squad, “Sigma,” is called in to deal with this deadly threat to all living things on Earth…