To tell you the plot of Palm Springs, a new comedy film produced by The Lonely Island trio of Andy Samberg, Akiva Schaffer, and Jorma Taccone, is to technically reveal a spoiler. This is a movie that begins as one thing, but then very quickly becomes something entirely different—and it’s downright brilliant. The basic, spoiler-free logline is that two strangers meet at a wedding in Palm Springs—bridesmaid boyfriend Nyles (Samberg) and the maid of honor and bride’s sister Sarah (Cristin Milioti). They become stuck there for reasons outside their control, and then begin to realize …