A dismissed worker from a toy factory goes rogue, he creates a tunnel from a toy factory all the way down, close to the center of the earth. He sets up a laboratory type workshop in which he will devise his master plan;

'To revenge against the people who dismissed him!'

He sneaks up each night and steals/takes different parts from prototype dolls. He works during the day to create the monstrosity that is a... Baby.

'A Baby?' you might ask, yes, an Evil, posessed demon baby. (With a chainsaw moulded onto his arm)