Los Angeles, 1890. 16-year-old Zella Doyle and her twin brother Alroy are founding members of the League of the Daring - a secret society of teenage futurists hoping to build the foundations of a brighter new society.However, in their last adventure, that spirit of daring nearly took Zella and her friends a step too far. Betrayed by their mentor, Doc Grimes, the League not only barely escaped with their lives - they also witnessed their friend Elijah being hurled back in time in one of Doc Grime's inventions - seemingly lost forever.Now, as Zella struggles with the trauma of what she witnessed, a new threat emerges. A rogue faction of time travelers have arrived in Los Angeles determined to eliminate anybody who threatens their twisted version of the timeline, no matter the consequences.This means the League of the Daring must live up to their name like never before - with Zella and her friends risking everything to defeat the time travelers, protect the timeline, and rescue Elijah from a dark and twisted potential future.