The Ndrangheta is the most powerful Italian Mafia syndicate. But to evade law enforcement, its organizers have had to go underground. The Ndrangheta is rich, powerful, and heavily involved with drug cartels all over the world. But the bosses can’t be seen in public. Instead, they hide out from the police in underground bunkers that are connected to ordinary houses. The region of Calabria is the hub of their international drug trafficking operation - and an excellent hideout. Shielded by a code of silence, the Mafia bosses live with the tacit protection of the local population.