The prologue is an homage to the original prologue in James Whale's Frankenstein (1931) - almost exact wording.
The fourth 'torture porn' feature film from Denmark, following Sunken Danish (2012), Madness of Many (2013) and Monstrosity (2014), all directed by Kasper Juhl, or the sixth if you include Antichrist (2009) and The House That Jack Built (2018), both directed by Lars von Trier.