Setinanuncannyfuture—orperhapsaslightlyalternatepresentwherecellphonetechnologyisnowheretobefound—AnnaandherpartnerRyanhaveachievedeverycouple’sdream:theyareinpossessionofadocumentcertifyingtheirtruelove.Theircomfortableifsomewhatmundanelife, however, leavesAnnaquestioningtheirsuccessfullovetest, administeredbyplacingtheirextractedfingernailsintoacutting-edgemachine.AnnasoonbeginsworkingfortheLoveInstituteunderthetutelageofDuncan(LukeWilson), which, inadditiontodeterminingacouples’statusviathemysterioustest, trainsthemtodeepenbonds.There, she’spairedwiththeexperienced—anddevastatinglycharming—Amirtotakecouplesatvariousstagesofrelationshipsthroughaseriesoflove-buildingactivitiesbeforethebigtest.Asthenewcolleaguesworktoamelioratetheconnectionsofclients, AnnabeginstowonderifperhapsAmirisheronetrueloveandiftrustingherownfeelingsisamorereliablemetricthanwhatisdeterminedbyamachine.