Index: ChapterX.Application/Story/Commands/UpdateHandler.cs
===================================================================
--- ChapterX.Application/Story/Commands/UpdateHandler.cs	(revision 877c13c3dd0934c1d31da7988d0d2c2c5925ed55)
+++ ChapterX.Application/Story/Commands/UpdateHandler.cs	(revision 0b502c2664f4d6c64626f3394b4f1dc540e0aa9b)
@@ -22,4 +22,7 @@
                 return new UpdateResponse(false);
 
+            if (story.UserId != request.CallerId)
+                throw new UnauthorizedAccessException("You do not own this story.");
+
             story.MatureContent = request.MatureContent;
             story.ShortDescription = request.ShortDescription;