This story is told in a non-linear format, meaning I'll jump around to different character plot lines, and some events may occur out of order. (If you've seen Quentin Tarantino movies, you'll understand.) Also, the title is Latin for, "Slaughter, Destroy."
Akatsuki: Occidio, Eradico
Phase 1
He sits on his bed, staring out of the single window. He sees a full moon. He begins to mutter to himself, in a monotonous tone.
Man: We're getting tired of being here. It's not good for our thinking.
He begins to speak again, but without the monotone.
Man: That's why they put us in here. They said we were too dangerous to be around normal humans.
He is in a mental institute for the criminally insane. He has Dissociative Identity Disorder. He also looks very bizarre. One half of his body is pure white, the other pure black. He has yellow eyes, and moss green hair. Most of his body is surrounded by a large carnivorous plant. His name is Zetsu.
Zetsu Black Half: It doesn't matter what they say. We can do as we please.
Zetsu White Half: That sort of thinking got us in here.
Zetsu Black: There's nothing wrong with having a good meal. We need to eat too.
Zetsu White: You know they don't like when we eat other people.
Zetsu Black: That's a shame.
Zetsu White: That is a shame.
He looks away from the window, towards the ceiling.
Zetsu White: They aren't very smart.
Zetsu Black: They don't know us at all.
He looks back towards the window.
Zetsu Black: We devour anything, flesh or not.
Zetsu White: Escape will be simple.
Zetsu Black: Because we are tired of being here.
Zetsu White: Yes, it's bad for our thinking.
The time is 3:27 AM. Two men cautiously walk out of a back door in an alley. They are both wearing clean black business suits. One man has long, black hair, and deep, strange red eyes. The other is tall, with odd blue skin, dark blue hair, and small, unblinking eyes. The former is Uchiha Itachi, and the latter is Hoshigaki Kisame.
Itachi: The Leader says the guy is currently in the Fire Country.
Kisame: That's a bit far to travel, don't you think?
Itachi: It doesn't matter. We need to get there before Leader's rival does.
Kisame: Remind me why I got into this line of work again.
Itachi: You've murdered many civilians, policemen, and agents in your home city. You were banned from there, and needed some sort of employment that didn't mind if you hurt people.
Kisame: It actually encourages it.
Itachi: Is that a problem?
Kisame: Sometimes I think it is... Other times, I just try to enjoy it.
Itachi: It's just part of our jobs. You don't have to feel guilty about it.
Kisame: ... So where exactly in the Fire Country is this kid?
Itachi: The City in the Leaves.
Kisame: Konoha city? Isn't that your home?
Itachi: My former home, yes.
Kisame: We'll have to be extra cautious then, won't we?
Itachi: Why? We can handle them.
Kisame: I suppose so. You wouldn't be too worried... You DID slaughter your entire family, after all, save for your younger brother. Why did you let him live, anyway?
Itachi: I have my reasons.
Kisame: I suppose that's your way of saying, "I don't want to discuss it."
Itachi: Standing here talking is getting us nowhere. We need to find our target as quickly as possible.
Kisame: I know, I know...
The two jumped on the rooftop of the building the exited from and jumped to the next roof. They continued to travel across the roofs, making their way to the City in the Leaves.