What Happens at Night is a chilling horror-mystery thriller that masterfully blends psychological tension with supernatural dread. The film follows an American couple who travel to a remote, snowbound European town with hopes of adopting a child, only to find themselves trapped in a nightmarish hotel filled with bizarre characters. As they encounter a mysterious chanteuse, a cryptic businessman, and a unsettling faith healer, the line between reality and nightmare begins to dissolve, forcing them to confront not only the strange forces at work but also the fractures in their own marriage.

The direction creates an atmosphere of pervasive unease, using the isolated, snowy setting and the hotel's Gothic architecture to amplify the sense of entrapment and otherworldliness. The performances are compelling, with the lead actors perfectly capturing the couple's growing desperation and paranoia as their simple mission descends into a surreal quest for truth. The supporting cast of odd hotel residents adds layers of mystery and menace, each character feeling like a piece of a larger, unsettling puzzle.

Viewers should watch What Happens at Night for its expertly crafted atmosphere, intelligent plot that keeps you guessing until the final moments, and its exploration of themes like parenthood, faith, and the fragility of reality. It's a thinking person's horror film that relies on psychological terror and mounting dread rather than cheap jump scares, making it a standout in the genre. The film's ambiguous ending will linger with you long after the credits roll, prompting discussion and interpretation.