Sage Stark, daughter of Tony Stark, has come of age and is allowed to join the Avengers like she always wanted to since she was a little a girl. Enrolling at Midtown High School for her senior year, Sage forms an abnormally close friendship with Peter Parker but being Tony Stark's mysterious daughter, she hasn't just spiked Peter's interests but the interests of the god of Mischief himself as well. However, with Thanos in possession of the Tesseract and planning on opening the portal to all the monsters of the nine realms while trying to reincarcinate every villian the Avengers ever fought, Sage has to put the idea of having a happily ever after to rest and learn to control her powers. With her father and Bruce's help, Sage finds she is capable of growing her powers but her relationship with a certain Avenger is also growing rapidly, despite her father's endless protests to put a stop to it. What will she choose? Love or war? And will Loki finally put his pride aside and let Sage have the love life she's always wanted, even if it means seeing her with someone else?