The Hero was always with the Doctor traveling with him and helping and saving people he couldn't save. One day, something happened with the Time Vortex and it sent the Hero to another dimension where she is no longer the Hero, but a college student name Maxine Caulfield and has no memory of the Doctor or who she really is, only she has the power to rewind time.

on their journey to find the next piece of the cube THE TARDIS seem to have problems trying to fly through the time vortex. The Doctor, Rosemary and nardole have landed near a lighthouse but when they see a tornado heading towards a town they soon have to figured out why and what is happening but the answer leads to a girl who was given powers to rewind time.

The Professor has never really been the same since the Great Time-War; moving from place to place without so much as a sparing glance or whisper. When his TARDIS crashes close to the small town of Arcadia Bay, the Professor decides to find out how and why; but in doing so, finds himself thrust into a whirlwind of events where the fate of the entire town hangs in the balance.

A strange man with a time travelling box. A strange girl with time travelling powers. 'Nuff said.