A DedSec representative appears in the trailer, his face and voice obscured digitally, to warn Chicagoans about the weaknesses of ctOS, the computer network that runs the city. He points out that they've detected a vigilante who has breached the system, which, according to him, is proof that ctOS is a flawed system. That vigilante happens to be Watch Dogs' protagonist, Aiden Pearce, who will use ctOS to his advantage in any way he can.
Watch Dogs will be available Nov. 19 on PlayStation 3, Xbox 360, Wii U and Windows PC; Nov. 15 on PlayStation 4; and at launch on Xbox One. Ubisoft also announced today that it is working with Sony Pictures on a Watch Dogs film.