A few months after the incident of April 13, 1975, during which Palestinian civilians were machine-gunned by Phalangist militiamen, the toll is most tragic: six thousand dead, twenty thousand wounded, incessant kidnappings, a semi-destroyed capital. This film traces the origins of the Lebanese conflict, the perception of a society that goes to war while singing. A unique document on the Lebanese civil war. Beyond the religious war, the painting of a social and political reality that has not changed much, more than four decades later.