Situated in Berlin during the Weimar Republic in 1931, under the presence of the growing Nazi Party, the film is loosely based on the 1966 Broadway musical Cabaret by Kander and Ebb, which was adapted from the novel The Berlin Stories (1939) by Christopher Isherwood and the 1951 play I Am a Camera adapted from the same book. Only a few numbers from the stage score were used for the film; Kander and Ebb wrote new ones to replace those that were discarded. In the traditional manner of musical theater, called an "'integrated' musical," every significant character in the stage version sings to express his/her