There are so many things human beings do not understand - can not grasp. We are trying to create order out of chaos with scientific models, trying to find the big theory of everything. But all our models, all our explanations, are merely a veil or perhaps a shield to protect us. To forget about God, Jesus, Allah, Buddha or whomever else you think is holding a protective hand over us. The truth is that the gods lurking behind the known universe and in crevices in time; they see humanity as a burr to be removed.
Skygger Over Danmark is a classic Call of Cthulhu scenario of unspeakable horrors, perilous detective work, and the price to pay to learn the truth.