In a 19th-century world filled with steampunk technology, the crown prince, Edward, is assassinated. It is revealed that his cousin, Richard, orchestrated the plot. With the Queen unable to rule due to her advanced age, the only obstacle standing between Richard and the throne is the young princess, Mary.

In Princess Principal Crown Handler: Chapter 2, a group of spies with unique powers navigate a steampunk world to uncover a hidden secret. This sequel to the TV series delves deeper into their thrilling missions and the intricate web of politics and espionage they must navigate.

Control — the Commonwealth's covert ops group — suspects a double agent within the Kingdom's royal family and dispatches Ange and the rest of "Team White Pigeon" to discover the truth.