It's several weeks after the events of Justice Wing: The Excelsiors Reaching Higher, and Mierra McCall -- aka the Rambunctious Rodent -- is on her way to the in-city summer camp Colin Church (aka the high flying Cavalier) set up for her to begin training and get her school life back on track. But where Mierra expected a computer coding camp at least as a cover story, instead she finds DETAILS Special Agent Lynette Hardesty, and a unique group of teenagers, including a rather strange young girl named Vortex, an oddly mature teenager named Cosette Wight, Colin Church's fourteen year old son, and her first step into another world. Oh, and Trudy. She also finds Trudy. The gateway to Justice Wing: Halcyon Days starts here.
After a lot of years, we finally go to Empire City, New York in the Justice Wing universe. For those who've wondered where the alleged Marvel influences on Justice Wing are... well, here you go.
For the record, this is a complete Novella. So... budget at least some time for reading it. And despite the header image? Amulet is only mentioned in the story. She doesn't appear.