Fairy Tail 439 discovers why Makarov disbanded Fairy Tail guild, to prevent the Alvarez Empire from capturing the Lumen Histoire which contains Mavis Vermillion. We follow as Erza, and others, find out about Fairy Tail’s biggest secret as they go into the secret chamber where Mavis is. Makarov went to the Alvarez Empire to stop their plans by threatening use of Lumen Histoire.