The Cave to Another World

Fed up with studying paleontology from the inside of a classroom, students Alexander Conway and Abasi Hamisi venture into Poland’s Białowieża Forest hoping to uncover Paleolithic relics.

After entering a narrow crawlspace deep in the forest, which they barely escape with their lives, they emerge in another world—a version of Earth where Homo sapiens never emigrated from Africa and subsequently died out. Instead, this world is ruled by two alternate hominid species: industrialized Neanderthals and their adversaries, the equally advanced Denisovans.

Upon being captured and brought to a Neanderthal mine-cum-prison, Alexander and Abasi are subjected to extended experimentation with no end in sight. Separated from his friend, and with the help of a young Neanderthal, Abasi must find Alexander and escape before they are lost forever in this alternate reality.