Your question is a bit hard to understand. In her mission, in the last step that has to be done . . .
what? What about the last step of that mission? Are you unsure how to do it? Are you wanting to clarify what the last step is? Are you following what the hint says but it doesn't complete the quest? Right now, what you've asked is a sentence fragment and doesn't complete an idea to make clear what you're wanting to know.
Also, this is not a dedicated translation thread, so please provide a translation into English for posts like this, as per
Rule #5.