Runa is one of the greatest monster slayers around. She's known as The Silencer for being able to quiet her targets before slaughtering them. Runa eventually gets a peculiar mission to hunt down a monster named Myvanwy who's been accused of terrorizing numerous kingdoms in the region. She accepts this mission, but Myvanwy's existence questions her occupation as Runa wonders why she took the quest. Her reality will be forever changed once the truth is revealed to her.