The sad and happy times of a young girl and her bear doll, a young mouse and his family, a sycamore tree, an old lamp post, a hoodlum moth and an alleyway full of posters coming to life.

When Sawa's mother and policeman father are found victims of a grisly double homicide, she begins a ruthless pursuit for the man who murdered them. With the help of her father's ex-partner, Karl Aker, and a mysterious friend from her past, she becomes a merciless teen assassin, blasting her way through the dark world of human trafficki...

A vicious sniper has appeared in Tokyo, rendering the people too scared to go outside, once again it's up to Conan to figure out the meaning behind the killings and capture the mysterious sniper before more lives are lost.