You'd progress through the Chest floor fighting through the various bosses in the place. In one of the rooms you'd see a huge, black and demonic woman who summoned lots and lots of shadow balls and some Little Hornies to fight you off. Once you're about to kill her she curls up inside the hole she comes from and says.

"W-Wait! i'm sorry i swear!"

She'd plead for her life, what will you do?