The Secretary of the main opposition party, Enrico Olivieri, is in the midst of a crisis. The opinion polls show him to be losing. One night Olivieri vanishes. The grey eminence Andrea Bottini and his wife Anna try to understand why he disappeared and identify a possible accomplice: the Secretary’s twin brother, Giovanni Ernani, an ingenious philosopher. Andrea decides to meet him and is so fascinated that he dreams of a plan that has the plot of a dangerous gamble.