Has been a year since Pietro Zinni’s gang got caught in the Sopox production laboratory and each of them locked up in different jails. From Regina Coeli jail, Pietro keep warning the authorities a fool synthesized nerve gas and he is ready to make a killing, but no one takes him seriously. So he puts in for a transfer to Rebibbia to meet Murena, who has useful information to intercept the murderer. After which, Pietro wants to get the gang of university researchers back together: the perennial unemployed (or detained) most brilliant minds around.