Mara Dust is just a regular twenty-year-old Earth Pony - but there is one thing that sets her apart from everypony else her age: She still has no Cutie Mark! Trying to start a new life in a foreign town and hiding her blank flank under a vest, she decides to move to Ponyville - but too soon her embarrassing secret gets discovered.
But luckily for her, she has moved to the one place where friendship can overcome anything… or not?