On a quiet British island, the summer of 1967 turns into a true hell as an extreme heatwave strikes the region. The atmosphere becomes unbearable for both the residents and tourists, who take refuge in the only hotel on the island. But the heat is not the only terror lurking; something more sinister is creeping in the shadows, something that will transform that seemingly normal night into a horrifying experience.
When a mysterious stranger arrives on the island, the residents begin to experience inexplicable phenomena. Not only does the heat seem to intensify, but they also feel watched, as if something is controlling their minds. As the townspeople, trapped in desperation and paranoia, try to uncover the source of this disturbance, corpses appear and increasingly strange situations unfold. The fragile bonds between the inhabitants start to disintegrate, and distrust permeates the atmosphere.
With the arrival of doctors and police, the situation spirals into the unknown. The quest for answers leads to a confrontation with forces that elude human understanding, revealing dark secrets and hidden jealousy. As the struggle for survival intensifies, the characters will be forced to confront their own demons on a night that will forever change the course of their lives, where true horror comes not only from the outside but also from human nature itself.