Bloody Mary's Mirror

Bloody Mary's story is written like this:
If you call Bloody Mary on a mirror in a dark room 3 times, she will appear as a reflection.
They say that this urban legend came from Queen Mary Tudor I and her wicked bloody ways of oppressing the people.

Three girls were having a camp night at school as a curriculum activity, then they decided to do this little ghost game of calling out Bloody Mary in an attempt to scare themselves.... but something different happened.

They found themselves swallowed by the dark of the mirror and they transmigrated to... different bodies and in a different world in the year 1553, the same year Queen Mary I ruled.
What will happen to them now, and will their friendships last?