The Grand Magic Games are over, but trouble is still present in Fiore. Frea finds herself in a lot more trouble than she could have ever expected, and she has no choice but to test the limits of her own Power, when things keep turning from bad to worse. But its not only danger that threatens her, its also the threat of keeping the balance between the people around her and herself.

When Lucy decides to go on her first solo mission, she encounters something odd yet mystical along the way, a Celestial Key made of gems, shimmering with whispers of forgotten magic. This is the spark to Fairy Tail's hardest mission yet as Lucy then receives a letter written in a perplexing foreign tongue mysteriously alike to Layla Heartfilia's handwriting...for her eyes only...