A slight cross-over between Doctor Who, XXXholic, and MLP
The Doctor and Twilight Sparkle return to Ponyville from one of their out-of-time adventures only to land in a suspicious stallion's yard. The stallion, who calls himself April Fool, believes their encounter is inevitable and implies that Equestria is on the brink of a great catastrophe, and that a price equal to their wish to save Equestria must first be paid.