Searching for a Manga

The part I remember is it is a woman who is good with swords. She ends up alone in a banquet hall, surrounded by enemies. The men that were with her shut the doors behind her and lock them. Although they are unsure that she will win, they leave her in there. It gets quiet, and then they go to open the door and she emerges covered in blood. They find out that she slaughtered all of the people in the banquet hall. That’s all I remember! Anyone remember this scene? Please help!!! (=・ω・=)