Here is the game’s story synopsis, via its official website:
A town on the cliffs living with the Cloud sea.
The story takes place in a small cliff town named “Calme.”
At the bottom of the cliff is the horizon of a cloud sea that never clears.
Above the cliffs is a haze far off in the distance.
In this town, there are cloud sea fishermen who make their living by catching creatures from the Cloud sea. What is the truth behind the mysterious cloud sea and the town?
This is the story of the unique inhabitants of this harsh but beautiful cliff town.
Watch the teaser trailer below.