The lady is Mrs. Hilyard, a wealthy poetess who lives in a three-story city mansion and her cage is her elevator, which stops a dozen feet short of the main floor due to an electrical failure on a July 4th weekend. She rings her outside alarm, eventually noticed by a drunken derelict, who breaks into the house, ignores her plight and helps himself to various items and alcohol. He leaves with his loot but returns a while later with a plump prostitute and three teenage hoodlums, who proceed to terrorize Mrs. Hilyard as they wreck her home.
Big Baby tells the story of Adam Lewis, a successful horror screenwriter struggling for inspiration for his latest script. After a graphic and realistic nightmare of a hulking man dressed in a baby mask and onesie who axe murders his girlfriend Kate in the middle of the night, Adam gets the inspiration he needs for his new screenplay. Excited about the direction his story is taking, he starts losing himself in his script. Things are better than ever for Adam and Kate until “Big Baby” starts appearing in real life and tormenting and killing victims fueled by his own revenge. Characters from Adam’s script begin to pay him visits pleading for their lives, and he quickly realizes he holds their fate in his hands. Power and fear completely consume Adam until his girlfriend Kate is terrified of the man she once loved.