Screen International described the film this way when first announcing the project:
Sales agents Reel Suspects tell us that a trailer is coming soon but, in the meantime, check out the first imagery below!"We Are the Flesh" is set in a post-apocalypse Mexico, where a brother and sister, Lucio and Fauna, wander a ruined city for years in search of food and shelter. They find their way into one of its last surviving buildings, where a man makes them a dangerous offer to survive the outside world. As they help him transform the building into a womb-like cave, a disquieting sexual relationship emerges, along with a dynamic in which darker instincts do their destructive work.