Kitrinos: Inside the Cube (2018)

In 1961, Professor Dimarx, an archaeologist on Terra, believes he has made the discovery of the century on the forbidden continent. He is accompanied by his long-time partner and friend, Gramuel Solus, who is filming the event for posterity.

At the ruins, they find a chasm with stairs carved into the rock. Strange black crystals are scattered here and there, suggesting ancient volcanic activity.

Elated by the discovery, Dimarx descends into the depths of the earth without precautions, as if drawn by an unknown force, in search of the first Black Cube in the modern history of Terra.