Copacabana Zero Hora.

Four boys, Eduardo, Rui, Júlio and Carlos meet in bars to plot scams and tricks. Among them is Teresa, with whom Rui is in love, even knowing about her pregnancy. The boy does everything to know who the child's father is, but uselessly. Eduardo is a day employee and a car thief at night. Júlio and Carlos use marijuana and do not hesitate to use violent methods in their designs. One night they follow Edna (student and bride) to her house.