You're watching five girls who could have been written as one-note spy accessories instead become the actual architects of impossible infiltrations. Each mission builds on what you learned about them the episode before, so by halfway through you're not just rooting for them to succeed, you're genuinely worried about whether they'll survive the choices they've already made. The show treats its premise with complete seriousness, never winking at the camera, which means every gaslit identity and every burned bridge actually costs something. It's Victoriana spy craft without the camp. The shortest season that ever felt complete.

Five girls sit in classrooms by day and slip through shadows by night. In late 19th century London, a giant wall splits the Kingdom of Albion into east and west, and the Kingdom and the Commonwealth wage a quiet war fought through espionage. At the prestigious Queen's Mayfaire school, these students secretly work as spies for the Commonwealth. Dorothy, a seasoned driver, leads the group, which includes Ange, a cold liar and skilled marksman; Chise, a capable samurai; and Beatrice, who can mimic voices. Using disguise, infiltration and car chases, each girl puts her own talents to work in a world of conspiracy and intrigue.