The Amulet of Mirrors is discovered and used by a bearer for the first time in centuries.
When Ruby Gray was six, these two superheroes disappeared, presumed dead, at the Battle of the Sky Demon.
Ruby accidentally travels back in time one month, and must avoid herself for the length of that month. Of course, being herself, she also attempts to create favorable conditions.
Ruby Gray and Ethelyn Suthmeer have a falling out and go from being like sisters to being sworn enemies.