《九月的某四天》是由布鲁诺·巴列托主演的一部动作片，Fernando, a journalist, and his friend César join terrorist group MR8 in order to fight Brazilian dictatorial regime during the late sixties. Cesare, however, is wounded and captured during a bank hold up. Fernando then decides to kidnap the American ambassador in Brazil and ask for the release of fifteen political prisoners in exchange for his life.