Jack Frost and his twin sister Trix Frost are Guardians along with Santa (North) Bunnymund (Bunny), Tooth Fairy (Tooth) and Sandman (Sandy). They just defeated Pitch but now something else is happening. One of the children of Pitch has followed in his footsteps and is trying to destroy the Guardians, and to finish the job his father started. But the other is the opposite. Man in Moon has chosen the daughter of Pitch, known often as Hestia or Phoenix, to be a Guardian. She has a few people who believe in her but not many. She has powers over fear like Pitch, to kill it, and to control it. She also has power over fire, hence the name Hestia. She will be a Guardian, but will they trust her? Or will she be outcasted like she always is anyways?