If you've completed the whole entire questline for Covenant in Fallout 4 and have read "Do Androids Dream of Electric Sheep?" you may find some strong similarities to certain aspects of it. Coincidentally, when I encountered this quest a while ago, I had recently finished reading DADOES.
Go to the top of the Mass Fusion Containment Shed building, there's the ending scene of Blade Runner recreated Honestly, I'd have expected a lot more Blade Runner references. They didn't even add the .223 pistol! WTF Bethesda.
Covenant is a small settlement, not actually related to the main story (although I don't know if you do much with them if you side with the Railroad).
Ohhhhh shit! THAT's what it was. I just wondered why they put a synth up there. Totally didn't get the reference until now. What about the guy in the bathtub with 3 machete-wielding mannequins around him, is that also from some movie?