What does Judges 19:25 mean?

But the men wouldn't listen. So the Levite grabbed his concubine and pushed her outside to them. They raped her and abused her all night until morning. At dawn, they let her go. Judges 19:25 - Modern Text Bible

(The Levite gives up his concubine to the mob, who assault her through the night. This is a moment of deep tragedy and horror.)