Middle-aged Shona McMonagle may look bookish and harmless, but her education at the Marcia Blaine School for Girls has left her with a deadly expertise in everything from martial arts to quantum physics. Shona's skills and loyalty make her the perfect recruit for an interesting new project: time travel to Tzarist Russia, prevent a gross miscarriage of romance, and see to it that only the right people get murdered. It's a big job, but in this debut, no task is too daunting for a prefect from Miss Blaine's.