When Money Isn't Good Enough (Kakuzu Story)

A bounty coincides with a mission for Kakuzu, and it becomes a matter of revenge as well as money. But the only way to track the ninja down and kill him is to go to outside help, and it turns out they have a lot more in common than he had expected. It's only through working together that they'll be able to find the ninja and complete the mission-and maybe even discovering more than they thought in the meantime.