After some investigating, you discover the woman went into a mine alone, and you have to follow in her footsteps in order to find her. One of the miners informs you that he heard strange sounds and gives you a knife so you can defend yourself against whatever you find.
From that moment on, the experience is very strange, but commenting any further would spoil it. All that matters is what happens in the game depends solely on you.
Moirai is a very unique interactive experience with charming pixelated graphics. It should also be noted that you'll need an Internet connection to play.