In a world fractured by war and governed by intelligence, Lily—code name Flower Garden—is resolved to become a master spy and help restore peace to the nation. Thus, when she is offered a spot in an elite squad that undertakes Impossible Missions with 90 percent mortality rates, she is thrilled...until she discovers that this so-called "elite squad" consists entirely of spy academy dropouts, just like her. Yet each and every one of them possesses the potential to change the world, and under the guidance of master spy Klaus, it is time for them to bloom!