Prologue 00: Age of Chaos
For the past few years in the Kingdom of Hyland situated in the northeast region of the Glenwood continent, unusual weather has increasingly damaged crops, and even affected the health of the people. Alisha, a royal princess, hears of an ominous mist that has been discovered in Guriel and sends Clem to investigate. When there is no word from Clem, Alisha begins to worry and sets out for Guriel with her attendants. They find the town still shrouded by the eerie mist…
Aired 03/07/2016EP 1 - Prologue 00: Age of Chaos

Tales of Zestiria the X
Sorey is a human youth who grew up among the seraphim, spiritual beings not visible to humans.
Sorey believes in the folklore that says “long ago, every human was able to see the seraphim" and dreams of unraveling the ancient mystery to make the world a place where people and seraphim can live together in peace.
One day, Sorey visits the human capital for the very first time. He becomes embroiled in an incident during which he pulls out a holy sword embedded in a rock and ends up becoming a Shepherd, one who casts away calamity from the world.
He begins to realize the gravity of his mission, and his dream of coexistence between mankind and the seraphim becomes more intense—
And thus, the Shepherd embarks on a journey with his companions.
(Source: Official Website)
Note: Includes episode 0.