Prince of Darkness (film)

Prince of Darkness is a 1987 American supernatural horror film directed, written and scored by John Carpenter. The film is the second installment in what Carpenter calls his Apocalypse Trilogy, which began with The Thing 1982 and concludes with In the Mouth of Madness 1995.

They decipher the text found next to the cylinder which describes the liquid as the corporeal embodiment of Satan. The liquid appears sentient, and broadcasts increasingly complex streams of data. The academics use a computer to analyze the data, and find that it includes differential equations. Over a period of two days, small jets of liquid escape from the cylinder. Members of the group exposed to the liquid become possessed by the entity, which uses them against the others. Attempts to escape from the building are thwarted by a mass of possessed street people who surround it and barricade the doors from the outside. Two members of the research group are killed.Birack and the priest theorize that Satan is actually the offspring of an even more powerful force of evil, the AntiGod, who is bound to the realm of antimatter. The survivors find themselves sharing a recurring dream apparently a tachyon transmission sent as a warning from the future year onenineninenine showing a shadowy figure emerging from the front of the church. The hazy transmission changes slightly with each occurrence of the dream, revealing progressively more detail. The narration of the transmission each time instructs the dreamer that they are witnessing an actual broadcast from the future, and they must prevent this possible outcome. ........

Source: Wikipedia