BigBabytellsthestoryofAdamLewis,asuccessfulhorrorscreenwriterstrugglingforinspirationforhislatestscript.AfteragraphicandrealisticnightmareofahulkingmandressedinababymaskandonesiewhoaxemurdershisgirlfriendKateinthemiddleofthenight,Adamgetstheinspirationheneedsforhisnewscreenplay.Excitedaboutthedirectionhisstoryistaking,hestartslosinghimselfinhisscript.ThingsarebetterthaneverforAdamandKateuntil“BigBaby”startsappearinginreallifeandtormentingandkillingvictimsfueledbyhisownrevenge.CharactersfromAdam’sscriptbegintopayhimvisitspleadingfortheirlives,andhequicklyrealizesheholdstheirfateinhishands.PowerandfearcompletelyconsumeAdamuntilhisgirlfriendKateisterrifiedofthemansheonceloved.