"Colton, a Trainer from Unova, has reached into the region of Suocé looking for distractions from his life back in Unova. He faces a surprising situation when after walking into an area expecting to fight some wild Pokémon, the Guardian Force Cobalion steps in to accept his challenge. Colton already skipped a Legendary fight in Unova; does he have what it takes to resist the power of one of the guardians of Suocé?"
The release page also has a link to the official wiki article on the story. Next chapter will be published sometime Aug 2020.