Rain is a well-educated, highly trained, and highly skilled professional assassin. He's not the only member of his clan, but he is the leader. He's the only one who knows the mission. Due to the fact that he's a star, he gets lots of money and support. He's on a mission to avenge his mentor. There's not much more to the plot.
Rain's mission is to kill his mentor's right-hand woman, a kunoichi named Kiriko. He's in love with her. But she was the one who killed his mentor. He's been trying to track down Kiriko for years, but she is protected by the clan. Rain wants to take down the entire clan.
While tracking Kiriko, Rain meets up with Mika Coretti, an operative for the US government. Rain is an extreme patriot and anti-communist. He isn't following the mission just for money or revenge. He's following the mission for revenge for his mentor. Raizo is in the middle of an international political conspiracy. The US government is using the clan as assassins for hire. 827ec27edc