Endless amounts of possibilities
There is no real story to this game, you make your own story and carve your own path in this. At night the game will get very dangerous and you will start to hide for you life. This is when you realize what you have to do in this game. Learn to survive the best way you can. You will learn yourself or (the internet) on how to make items by getting materials around this world. With those materials there is literally nothing you can not do. Want to make a castle? Go ahead. Want to make a bridge? Go ahead. Want to create a tower that goes into the sky? Go ahead.
Before those steps however you must first mine underground and get the stone/ore you need to make such buildings.
Game is amazing and worth it to check out.