Y/N Castle. The best assassin SHIELD had ever seen. Had ever even heard of. Not to be dramatic, but possibly better than her father. Frank Castle. The man she had gained all of her knowledge from, all the techniques she uses, the best weapon choices. Ever since the incident with Thanos, things with the Avengers weren't really intact, which made everything in her life ten times more intense. So she began working overtime for Fury. The man who overworks her 24/7. Also, the man her dad had assigned to keep her safe. Making sure the missions are always something she can take care of, which they always were. A special mission sends her to London temporarily, where she's ordered to kill the one and only, Moon Knight.