What Happens at Night is a masterfully unsettling horror mystery that plunges viewers into a world of creeping dread and psychological disorientation. The film follows an American couple whose journey to a remote, snowbound European town for a seemingly straightforward adoption descends into a surreal nightmare. Their stay at a haunting, isolated hotel becomes the catalyst for a series of bizarre encounters with the establishment's strange inhabitants—a mysterious chanteuse, an enigmatic businessman, and a cryptic faith healer.

The film's greatest strength lies in its atmospheric direction, which builds tension through lingering shots of the oppressive winter landscape and the hotel's shadowy corridors. The performances are uniformly compelling, with the lead couple portraying a palpable sense of fraying sanity and marital strain as their quest for the baby becomes increasingly fraught. The supporting cast of odd characters adds layers of ambiguity, making viewers question who is trustworthy and what is real.

As the line between reality and nightmare blurs, What Happens at Night evolves from a simple thriller into a profound meditation on parenthood, loss, and the fragility of identity. The chilling score and meticulous sound design amplify every moment of suspense. This is a film that demands to be watched for its intelligent plotting, superb craftsmanship, and its ability to haunt the viewer long after the credits roll. It's a standout in the psychological horror genre that rewards attentive viewing with deep, lingering unease.