AteamofprogrammersdeveloparevolutionarynewdatingappcalledOtherHalves.Onthenightbeforetheappissettolaunch,theydiscoveritcausesstrangesideeffects:usersloseallself-control,becomingamoral,lascivious,violent...evil.Theyconsidershuttingtheappdown,but...Evilisprofitable.