When three trash-picking boys from Rio's slums find a wallet in amongst the daily detritus of their local dump, little do they imagine that their lives are about to change forever. But when the local police show up, offering a handsome reward for the wallet's return, the boys realize that what they've found must be important.

Set in São Paulo's House of Detention, locally known as Carandiru. An oncologist arrives at the jail to test patients for HIV infection. Seeing the disease, overcrowding, and rampant circulation of drugs, the doctor comes to realize the internal power structure among the prisoners. Narratives develop, including the attempted murder of Dagger, the solitary confinement of Chico, and the romance between Lady Di and Too Bad. The doctor eventually begins...