"She was having another of those moments. The ones where haunts from your memory slip through your mental blockades and remind you of all the terrible things you've ever done. The ones where you watch yourself pave the road to Tartarus with your good intentions. The ones that brought tears to Twilight Sparkle's eyes as she watched the sky's violet and pink hues herald the sun's setting."

Twilight Sparkle and Rainbow Dash visit the Frozen North, cradle of pony civilisation, to search for the cure to a mysterious affliction plaguing the former. How long until they too join the icy grave of ancient ponykind?