+1 kicks off with a couple of friends heading to an immense college party, with one of them looking to confront and reconnect with his ex-girlfriend over the course of the night. Most of the film’s first act plays out like a straight party movie, with all the trashy white kids getting wasted you’d expect and some crass humor that doesn’t always work out. Some bad special effects hint at something more ominous, and once Gullo & Iliadis’ real intentions kick in, things get plenty more interesting.
Moving the work from a traditional party film to an imaginative sci-fi thriller is a smart move. Mysterious blackouts kick in, causing a shift in time that creates doppelgangers of everyone at the party. Romantic drama devolves into this incredibly uncomfortable obsessive relationship, with the doppelgangers factoring in to heighten the creepiness levels of it all.