I have an idea for a story I think I'll write.
It's about two twins (one girl, one boy) named Petra and Collier who are eleven years old, but already doing tenth grade work at a bording school.
Their favorite teacher, Professor Kreisler, begins to act strange and is always late to class. He sometimes rushes out of class for no apparent reasons, and sometimes he skips class entirely.
The school board decides to fire him, but Petra and Collier don't want him to go. Because they are different genders, they live on opposite sides of campus and don't see each other very often. But when both unexpectly meet while following Professor on one of his rushed journeys, they realize that they have to stick together.
They try to stay hidden, but Professor finds them the next day. He is not surprised, though-- he is relieved, because he needs them to do secret work for him.
He reveals that he does "underground" work and is trying to stop a former student, Asher Dakota, from exploding every water tower and water resovoir in the state.
Unfortunately, Professor does not know how Dakota plans to do this. But he does know that Dakota is looking for a young child to teach, because he isn't sure he'll be able to carry out his plan in his own lifetime.
Petra and Collier jump at the chance. Petra cuts her hair to look like Collier, so the two are nearly identical. They take turns learning from Dakota, and switch places at night.
This goes on for a long time, with Petra and Collier learning more and more about the plan. Sadly, everything is set, and they can't figure out how to stop it.
One day before Dakota plans to carry out the plan, he goes missing.
Petra and Collier both look for him. They find him in a hidden underground cell with an extremely high fever.
The twins know that there is a slim chance he will live, but they are still afraid. When the two apporach him, Dakota is confused and thinks he's seeing double, because he does not know that he was really teaching two kids.
Petra and Collier alert Professor, who comes to their help. Petra and Collier continue confusing Dakota, while Professor crashes the system that is about to set off and burst the water towers.
The three lock Dakota in a cell and alert the police, who come and arrest Dakota.
Professor drives Petra and Collier back to the boarding school, where the twins find out that they had missed so much class that they were expelled.
The next school year, they had Professor come to their home and give them private lessons-- half on the school work, and half on secret agent work.
