There was a girl named Sherry, a quite but unique girl. She's fifteen years of age, a fourth year high school student, and studied at Frost High School. Every people and her thought that she brings misfortune. She's also finding a guy who killed her mother for twenty consecutive years. She learned various languages and variety of fighting skills. Now, her life's been hectic with the gloomy days and nights that surrounds her. She may be cold-blooded but she has a warm heart. To find her mother, she have to find the key that's hidden somewhere around the world.