Thefilmtellsthestoryofayoungaccountant(Herrán)onremandpendingtrialforembezzlementandpossiblyfacing10to20yearsinprison,adisproportionatesentenceforthenatureofhiscrime.However,thisis1977andinsidetheModeloprisonitisacaseofsurvivalofthefittest.Despiteeverythingworkingagainsthisacquittal,theyoungmanrefusestodiveupandjoinsagroupofprisonerspreparingtodemandamnesty.Ifthingsarechangingoutsidetheprison,theymustalsochangeinside.ThisbecomesCOPEL,theCoordinationofFightingPrisonersddd