It seems simple: an egg + sperm = one embryo. But if your sperm is "few, vague and abnormal" and your woman is premenopausal at age 37, things start to get complicated.
Leo is a successful author of mystery novels, who writes under a pseudonym. While penning his next book in an isolated chalet, he receives a strange visit from Jota, a somewhat troubling character, who claims to be a journalist.