The Covert Guardians

AU: It's June of 1944, and World War II has thrown the nations into chaos. A threat hidden from the mortal eyes of the world has crept into the city of New York. But a rag-tag team of spies who call themselves The Covert Guardians has been tasked to extinguish this threat. They recruit Percy Jackson to help them in their efforts. Will they prevail, or will they die fighting?