On the darkest days of winter, a storm hits the Crystal Empire with unforeseen force. However, this storm not only hits the crystal ponies with snow and ice, but also brings along a foe from ancient past.
Crystal Note finds a way to explore her lost memories in hopes to find out who she really is and how she became a crystal unicorn. In doing so, she receives help from an unexpected source.
A crystal pony arrives at Sweet Apple Acres only a few months after the return of the Crystal Empire. While trying to find out why the crystal mare left her home, Applejack discovers more than one secret surrounding the unusual visitor.
A few weeks have passed since Crystal Note's arrival in Ponyville. With the help of new friends, she can now take the first steps to uncover the secrets in her past.
Crystal Note gathered all her courage and makes the way back the Crystal Empire in hopes to regain her lost memory. Her trip to the past does not turn out as expected though.