A ghost story, a simulation, a message unspooling from a fax machine: In the Air Tonight recreates the apocryphal narrative of the origins of Phil Collins’ anthemic ’80s mega-hit, via the voiceover of an “artist friend” nicknamed Slipperman, who narrates a lurid backstory against exquisitely montaged footage evoking shimmering cocaine-fueled LA nightlife, slo-mo moonlit waves, and the glossy black hood of a Ferrari.