Public Summary Tony Stark saved the world. He never realized someone in his own family needed saving. For twenty years, Tony Stark believed his sister was gone. Buried in the past. A mistake Howard Stark forced him to leave behind. Then one unexpected day, Child Protective Services arrives at Avengers Tower with a suitcase, a stack of paperwork, and a kid who changes everything. Y/N Stark-Smitt is Tony’s niece—the daughter of the sister he abandoned, a child who survived years of abuse, criminal exploitation, and a dangerous experiment that awakened abilities no one could explain. Now, with no warning and no chance to prepare, Tony Stark is forced into the role he never expected: guardian. But Y/N isn’t just another responsibility. She’s a reminder of everything Tony lost, everything he regrets, and everything he still has a chance to fix. Thrown into a world of superheroes, impossible technology, and a family she never knew existed, Y/N must learn that she is more than her past, more than her powers, and more than what others tried to make her. As the Avengers rebuild after Civil War, they discover their newest challenge isn’t an alien invasion or a world-ending threat. It’s learning how to become a family. Because sometimes the person who needs saving most isn’t the world. Sometimes it’s the person standing right in front of you.