Butlers and Demons

Mark Evans will start his new job. His father did not warn him, however, that he would be the butler of a rich and powerful demon lady who fights against a group that wants a revolution.Now Mark is at a crossroads: on the one hand, he becomes extremely powerful, on the other hand, he doesn't want to use his powers to hurt anyone.Will Mark be able to survive in this bizarre new world?

(Learning English, sorry in advance for some crazy error)