Ginny's Children's Strange Journey

Ginny Snape's daughter, Rose, has a dream that tells her that Gaia is about to strike again. To prevent this from happening Ginny sends her, and her brother, back to her very own first year and joins up with Harry, Hermione, and her own mother to keep not only Gaia from rising early but also Kronos and Voldemort as well. A Harry Potter/Percy Jackson crossover.