Everything was normal. You were on picnic with your friend giraffe and your pet rock. You were playing with your friends, but all of sudden evil Mr B showed up and stole your pet rock. How rude! Now everything is on you and your giraffe friend.
You start with simple sword and bombs as weapons. As you go through the game, you'll get better weapons.
You can always learn something new from villagers, so it's good to talk with them. There is also shop in game where you can spend gold.
Explore the land, battle enemies and bosses, upgrade your abilities and save your pet rock from evil hands of Mr B.