1828. In the wake of the repression of revolutionary movements in Southern Italy, three young friends join Giuseppe Mazzini's republican and unificationist cause. Their idealism will clash with the inevitable disillusionment as they grow apart over the decades.

Naples, 1959. Pure Mathematics professor Renato Caccioppoli, Bakunin's grandson, is a tortured soul. Recently discharged from the psychiatric hospital, left by his wife, and increasingly disillusioned with academia and the Communist Party, he lives his last days with painful detachment.