A group of thugs in London's Ballard neighborhood, Moss (John Boyega), Dennis (Franz Drameh) and Calvin, rob a female nurse Sam (Judy Whitaker Jodie Whittaker) in the dark. While they are committing the crime, an unknown creature falls from the sky and bites Moss, and Sam escapes. Angry Moss killed the small creature that was not an ape or a dog, and took the body to visit Lang and Gao Hat, who grew marijuana. After learning that the creature might be an alien visitor, Moss came up with the idea of making money, but after they went out, the situation took a sharp turn for the worse. first, a large number of similar creatures fell from the sky, and then Moss was arrested by the police brought by Sam. Moss and his companions escaped in a mess. Because the car that hit the high hat on the way had to hide in Sam's house to avoid the pursuit of alien monsters, high hats and the police. Moss led his companions to try to defend the neighborhood but could only run away from the monsters, and to make matters worse, the main goal of these monsters seemed to be to kill Moss, who had killed the little monster.