OR:
How Starlight Glimmer and Trixie Ruined Saved Hearth's Warming Eve.
After a re-gifting mixup, Twilight Sparkle's life is in Starlight & Trixie's hooves! Can the two of them save Hearth's Warming Eve? Perhaps more importantly, can they do it without anypony noticing?
Ponyville is probably doomed.