Recap of Violet Evergarden.

At the end of Arcadia of My Youth Capitain Harlock and the crew of the space ship Arcadia had been banished from Earth. The Earth, as well as many other planets in the universe had been taken over by the Illumidus, a race of destructive humanoids who ruin, enslave or destroy almost any inhabitable planet they come across. In Endless Orbit SSX Harlock battles the Illumidus while searching for a mythical Planet of Peace where all the peoples of the universe can live freely and without war. (Source: Wikipedia)

Trouble arises in Staccato one day. Demons show up and start to wreak havoc on the townspeople. The entire country seems to be suffering. The source of the problem is that the barrier which until now has kept the demons from crossing over to the human world, is weakening. The person who sustains it is losing her strength after holding it up for so many years. That person is Queen Horn of Sforzando. Hell King Bass is trying to break through the barrier and release their supreme leader, Kestra (Orchestra). One whose power is unparalleled yet is trapped somewhere in the world of the humans. (Source: AniDB)

The survivors of Kanto's Hell Earthquake built a new city and christened it Hope Town. However, this peaceful town becomes a nightmare when it's raided by the motorcycle gang, Hell's Wind. They abduct the women while the remaining townsfolk are left helpless against them. Meanwhile, a boy, Subaro, meets Jun. Jun's lover was previously murdered, and the duo help one another to fight against Hell's Wind. The battles are getting more and more difficult, but with the appearance of Violence Jack, the citizens seem to gain the upper hand against Hell's Wind. (Source: AniDB)