Rumor in the City and the City is an installation based on the research conducted on the presupposition that rumors, circulating in various ways in the information technology society, are an interface or an arena for information battle. Unmake Lab researches the rumors about ‘the city and the city’ which is said to be two cities but actually one. In this city, two paradigms of industrial and information technology societies overlap, and furthermore, one is gradually beating off the other. The rumors collected through the research are represented in different voices or signs to be delivered to viewers. They listen to or wiretap the rumors, weaving the history of the two cities. This is both the process of secretly communicating the reality of the city which is not recorded in history, and a work to build an interface between the double cities.