Lucy, Erza, Gray, and Natsu go on a mission specifically sent to them by the magic council.
The job was simple enough, wipe out a dark guild. Everything goes smoothly until Lucy is killed by one of the dark mages.
Lucy's spirit is brought to the Celestial spirit world, and the Celestial spirit king gives her two choices.
Let your spirit move on, or give your spirit to a key and become a celestial spirit.
How the the guild handle Lucy's death?
What choice will Lucy make?
I Do not own Fairy Tail, Only the plot