This story is about a world where we as the human race have invented time travelling and discovered this concept called the timestream. But when we did moments from the past start to change which would ruin the timestream so they invented something travellers which are pretty much time police and send them back in time to make sure the events happened as before. But for the main characters mission was a lot more different than the usual mission. (This is part 1 of more too come hopefully)
More details