Pinkie Pie has a husband and a daughter and a very nice life in Ponyville. Sure, the times of villain fighting are over for her, but she's content to be a slightly less wacky mother. But when Pinkie Pie overhears Lyra lie about her age, Pinkie grabs Fluttershy and leaves her life behind to trail two mares that she believes to be immortal.
Even when news of Vinyl Scratch's death reaches Pinkie's ears, she doesn't believe it. Even when Fluttershy returns to Ponyville, Pinkie won't give up her search.
The truth, however, is more than Pinkie bargained for.

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Cover art by Macheteponies