As a small unicorn filly, sweetie belle has a simple normal life, but one day when she is left with fluttershy, she notices strange things about her, and when she uncovers her dark secret, she will soon realize that she and her fellow cutie mark crusaders are equestria's only hope in winning against the trials that are soon to come for every pony. So, is fluttershy a true friend, or is she simply an imposter?