Your expected teen novel strong female leads Annabeth, Katniss, and Hermione are now close friends. They take a quick trip to the bookstore and are spending the day together. While an empty movie theatre, someone emerges from the shadows. It's Iron Man! He has a secret mission for the young ladies. Since they aren't super heroes, he decides it's better to ask for their help since nobody will suspect them of anything strange, especially when checking out several alarming and space related books from the library.

As they begin to discuss their plan, Katniss Everdeen reveals a personal connection to the restricted section, and the group must navigate her complicated past in order to move forward with the mission.

Katniss's revelation sparks a heated debate among the group about the morality of their mission, with Annabeth arguing that the ends justify the means and Hermione countering that they must consider the potential consequences of their actions. Their mission revolves around investigating the nuances of time travel and the multiverse in an attempt to better understand Stark's suspicions of it existing.

As tensions rise, the group engages in a heated debate about the ethics of interfering with the timeline, with Tony Stark's cavalier attitude clashing with Hermione's cautious approach.

They enter the Library of Alexandria, which is somehow alive and shifting. Each of them splits up to find their target book: Hermione’s is written in a language that keeps rearranging itself. Katniss has to climb a dangerous archive tower guarded by a very annoyed phoenix. Annabeth’s section is protected by a riddle-based lock and a weird little AI assistant who won’t stop quoting Shakespeare. Each girl shows her strength—logic, courage, strategy—and they succeed. Barely. Then, the real issue: Someone else is already there, checking out the same books—but they disappear through a portal before the girls can catch them.