At the end of the 19th century, London, the Kingdom of Albion has been split into East and West sides by a giant wall. Five girls attend Queen’s Mayfaire, a conventional and prestigious school. Under the guise of regular high school girls, they act as spies under cover. Disguise, reconnaissance, infiltration, car chases... Each girl uses their own set of special skills to dart around the world of shadow.
In the world of spies, Ange works in the shadows but is suddenly moved when Eric makes a heartbreaking plea. Will Ange believe him?
Ange has just transferred into Queen's Mayfaire Academy, and she's on a mission to recruit the Princess. The only thing standing in her way is the Princess’ agenda.
The connection between Ange and the princess comes to light, and the girls discover Beatrice's extraordinary talents.
The girls are sent to retrieve a certain prototype from the Kingdom. In the meantime, Dorothy must keep a close eye on a friend.
The Princess must host Lord Horikawa during his time in the Kingdom of Albion. Only to be met with assassination attempts directed towards them both!
Dorothy must take a case that involves her father, to retrieve a something from a dead body at his morgue. Does this bring them back closer together?
The girls have their next assignment, and they must infiltrate a laundry mill to find a deadly weapon. In the mill, they catch a glimpse of the workers' conditions.
As Ange is painting, she is reminded of the first time she met the princess. With fiction and reality clashing, Ange questions herself.
Chise writes to her sister about her life in the Kingdom of Albion, and how she struggles to adapt to their customs but the girls try their best to make Chise feel at home.
Control gives Ange and Dorothy a new assignment along with an old acquaintance. Unfortunately, old memories arise that can’t be swept away.
Ange must now fulfill her newest orders: assassinate the princess. With outside forces starting to make their move, what will happen to the Princess and Ange?
With time against her, Ange will stop at nothing until she has the princess next to her. Will she be too late to save her?