Since learning that Tony Zucco is still alive, Nightwing has come to Chicago to find him. Unfortunately, the city seems to have a policy against masked vigilantes. Currently, the city is being plagued by someone called the Prankster, who disabled New Western Station, and it is only just being reopened by the mayor when Dick arrives. The mayor has a plan called "closure" which he hopes will bring an end to the disturbances caused by masked vigilantes.