Cuckoo, directed by Tilman Singer, is a horror film that follows 17-year-old Gretchen and her family as they navigate a strange Bavarian resort. The unsettling atmosphere is driven by Herr König, the resort's owner, whose sinister interests in Gretchen's mute half-sister Alma reveal a breeding program for superpowered humanoids. While the film features effective moments of tension and an emotionally charged climax, critics note that its convoluted plot can be confusing and detracts from its overall impact. The film has been described as both bizarre and intriguing, with standout performances, particularly by Dan Stevens. Despite its unevenness, Cuckoo leaves enough unanswered questions to hint at potential sequels. Overall, while it has its flaws, the film successfully creates an unsettling mood that resonates with its audience.