"Sinuaria" deals with Michele Murtas, an imprisoned young man in the Asinara's penitentiary at the end of the 70s. He has a talent for hairdressing, and all the women on the island love him for that.

Alex, an idealistic young assassin, is seen leaving the scene of the crime by a witness, a grave mistake in the eyes of the organisation for which he works. When his Boss assigns him a new long-term job, his commitment to the honourable cause of the organisation is called into question by old friends and new rivals.

The 1990s. The story of the longest Anonima Sequestri kidnapping, that of Giuseppe Vinci, whose family supermarket chain was spread all over Sardinia.