Once upon a time, two races ruled over Earth: Humans and Monsters. One day, war broke out between the two races. After a long battle, the humans were victorious. They sealed the monsters underground with a magic spell. The humans’ fear of monsters was based mainly on the monsters’ ability to absorb human SOULs. Trapped underground, the monsters explored their new environment and slowly set up a society there You fall down into the underground and land on some flowers Flowey: Howdy I'm Flowey