Residents of the city of Parada 88, contaminated in 1994 due to the explosion of a chemical industry reactor, live in plastic tunnels, the only way of life that can guarantee their survival, since oxygen, which has become a good consumption, used needs to be reused so as not to generate more expenses. One day, Joaquim wins a lottery that gives him enough money to pay for his and his family's oxygen; but to claim the prize, he'll need to go to the ruins of the factory to collect news from a group of contamination experts adventurers posted there.

Cláudia returns to her rural hometown in order to take revenge for the murder of her family a long time ago. She believes that the Flores family committed the crime and tries to destroy them....

In the 1950s, Lurdinha and Marcos fall in love at the first sight. She studies at the Institute of Education, and he studies at the Military College. Two traditional educational institutions in 'Tijuca', in the North Zone of 'Rio de Janeiro'. But Lurdinha's conservative parents reject Marcos because he is son of separated parents and try, in every way, to keep him away from her.

egina is a woman from a poor family and married with and former secretary of the wealthy Hélio. Regina has a block with Hélio and can not have sex with him, in spite of fantasizing kinky sex with every man she meets. She goes to a shrink and while resolving her childhood trauma, Hélio has an affair with his secretary Lúcia and leaves Regina. Later, they meet each other by chance, and the healed Regina finally satisfies Hélio.