A semi-documentary on the people of Rio de Janeiro. The camera follows boys from a hillside shanty town who sell peanuts at Copacabana, Sugar Loaf Mountain, and a soccer game. Various subplots, involving characters they meet along the way, are interspersed. 《里约40度》是一部半纪录式影片,描写巴西里约热内卢酷热的一天,人们的真实生活和景象。《里约40度》标志着一位杰出的电影导演的诞生,纳尔逊.佩雷拉.多斯桑托斯,这位巴西新电影之父,由此得到了第一次成功和国际影坛的关注。