An obsessive Italian high school student becomes intensely infatuated with Giulia, a beautiful but highly unstable woman engaged to an imprisoned left-wing terrorist on trial. As the two plunge into a volatile, explicitly passionate affair behind the backs of their families, the boundaries of loyalty and madness blur—culminating in a complex domestic dynamic when the fiancé is released and a marriage is forced, transforming her hidden passion into a systemic act of marital infidelity.