Nico lost everything. First, he lost his sister, then he found his family, but they were taken from him as well. Hazel, Annabeth, almost all of the seven, even Will. The only people that are left are Rayna and Percy. but Reyna had duties as praetor, and Percy was out on his own trying to deal with his own mental sanity. One day, he's fighting off a large group of monsters and shadow travels to get away, unknowingly shadow travelling into the Watchtower. What will happen when Nico meets the Justice League?