While Charlie is in the hospital, he is mistaken for a hitman's target. Kaz inadvertently blocks Charlie's shot at the would-be killer while in pursuit. They wind up sharing a room while trying to figure out what's going on. It seems that Charlie's previous roommate is the target of mob hit being coordinated by the hospital's chief-of-staff.
Kaz's mother comes to town and surprises her by announcing she is getting remarried. While meeting her fiancé they are hailed by a barrage of bullets. Kaz has a hard time dealing with this and the fact his mother is getting remarried. It appears as though Kaz's mother may be the victim of a jealous lover, her fiancé's business partner.
An older cop is shot in a bank, but the case and everything about it is made non-existent. Charlie begins to think about retiring or moving to that desk job. The perpetrator is cocky and appears to be connected; Charlie and Kaz are ready to break his connection, even to the point where the give up their badges.
G.P. Svetlo, a rude detective from Louisiana, is in town searching for his lost daughter. During a raid he and his daughter are arrested. Kaz soon realizes that this man is highly dangerous and his deadly scared daughter Lauren is his target. Charlie and Kaz try to help her but G.P. keeps on crossing their way. They both assume that there must be more than just a run-away girl and phone to Louisiana. It seems that Lauren has stolen the counterfeit money G.P. took after arresting a gang of counterfeiters.
Two men are killed. 30 years ago in college they were part of a group which was charged for the death of a fellow student in a test of courage. Charlie and Kaz want to protect the remaining three from the killer, but it seems the killer is among them. Helping Charlie and Kaz is a member of the bomb squad named Dutch. Though he's quite a specialist, Charlie discovers Dutch's could-get-dangerous illness - schizophrenia.
Charlie, the ""Rainmaster,"" attends the reunion of his old Vietnam Army unit; however one of the members is murdered. The man wanted to talk to Charlie about something before the reunion; Charlie and Kaz discover that other members are acting as a freelance mercenary unit. This unit's latest plan is to take the life of a South American leader.