In this game, you play as a 'thrall' (a member of a servant caste) in a community where gryphon riders are trained for war against wrym riders.
One day, a gryphon mom rejects a small egg. You hatch it and raise it, which is against society rules.
Most of the game is about hiding and raising the gryphon, with a slightly smaller chunk involving the aftermath of being discovered.
The game has a very small number of stats for yourself (with several more once you get a gryphon), but manages to be fairly confusing with the stats. It's pretty hard to know which stats are being tested when.
The game itself is oddly toothless. It sets up some worldbuilding but doesn't do much with it. There is tension between 'thralls' and 'keepers', there is a war, but what is actually going on? Everything is so vague. Are you 12, or 16, or 24? (That may have been answered somewhere, but it's hard to tell). One second you can be what seems like a highschool kid, and another you can scare a guard by saying you've killed people. The wyrm riders are different from you, but how? Do they speak another language? Wear weird armor? You are in the wilderness for months. What does that do to you, mentally and physically?
Nothing really gets answered. And like other reviewers here and elsewhere have noted, there's not really a climax; you kind of wander around until the end, with the ending final scenes very similar to scenes from the middle of the game in terms of tension and result.
All that said, the best parts for me were the ones interacting with the griffin and training it. In that respect, this game reminded of The Last Monster Master, but with less systematic training and more individual personality.