The first book follows *Phoenix Flare*, a nonbinary demon with the rare ability to see both the past and the future-an ability that no one else in their family has. The story begins with Phoenix having a vivid dream in which an unnamed demon shatters the *Crystal of Peace*, an ancient artifact that keeps the realms in harmony. The dream ends with the demon's death as the cave holding the crystal collapses. Later, Phoenix realizes this was not a vision of the future, but a glimpse into the past.
Phoenix goes to high school, where they meet their best friend *Clover Streaks* and new friend *Nova Nights*. Soon, they hear rumors about *Star Sightz*, the ruler of the underworld, who surprisingly attends the same school. Despite his intimidating reputation, Phoenix and Star begin to cross paths, and Star slowly becomes more prominent in Phoenix's life.
Star's presence grows darker as he falls under the control of an unseen force. He acts against his will, lashing out at Phoenix and their friends multiple times. Despite Star's attempts to explain his actions, Phoenix is angry and confused, especially after Star knocks them unconscious with his powers during one of his controlled episodes. When he snaps out of it, Star realizes he truly cares for Phoenix, but fears they may never trust him again.
In the aftermath, Phoenix, Star, Clover, and Nova work together to break the "Shadow Crystal". By destroying the crystal, they ensure that Star will never be controlled again.
Despite their victory, Phoenix remains conflicted about their feelings for Star. While Star deeply regrets what happened and wishes to help Phoenix, their relationship remains strained by the events of the story. The first book ends on a note of unresolved tension, setting the stage for more adventures and emotional development in future books.