Alcahest synopsis

A thousand years ago, an ominous star's radiance in the sky revealed the demon god Alcahest, bringing chaos and ruin. In this time of despair, a single swordsman borrowing the Guardians' power slew the demon. 1000 years have passed and a new battle ensues. A ruthless emperor leads his troops towards world conquest and the kingdom of Panakeia is threatened. Assume the role of the swordsman Allen, reclaim the power of the guardians, and defeat the forces that would resurrect the demon Alcahest.