Solange is a recently married young woman whose wedding night did not end well. After constant fights with her husband, she decides to live through her sexual frustration by sleeping with strangers she picks up on crowded buses in Rio de Janeiro.
Carlos and Solange, childhood sweethearts, marry after a chaste courtship. On their wedding night, Solange refuses to make love to him. First, he pleads, then in anger he abuses her. She says she adores him, but, even after months of marriage, can’t endure his touch. To prove to herself she’s not frigid, she begins a daily routine of seducing strangers on public busses. She also takes Carlos’s best friend to a motel. Carlos figures out that she’s unfaithful and, armed, confronts Solange. Meanwhile, she seeks psychiatric help because she feels no remorse. Will there be violence and death, a psychological breakthrough, or more bus rides?