Gee is running for mayor and one part of his platform is a plan is the legalization of drugs. As he is making an appearance at the Inner Harbor, he is shot multiple times. Current and former members of the Homicide unit receive the news and begin to converge on the hospital and the unit. Bayliss returns from his self-imposed sabbatical; Pembleton stops the class he is teaching and they go back to the unit along with Howard, where Lt. Gharty and the squad are beginning their quest to find the shooter. Bolander, Russert and later Brodie arrive at the hospital. MGee is hostile with the media and is angry with himself for his feelings that he still hasn't fully reconciled his relationship with his father. Pembleton detects that Bayliss is jumpy about Lewis' open case involving Luke Ryland. Pembleton and Bayliss go into the box and take over the interview of homeless guy that grabbed Giardello, just before the shooting. Det. Hall brings a complaint to Gaffney about losing his interview. Gaffney comes down to bust Gharty's balls and tells Pembleton that as a civilian he needs to get out of this official investigation. The detectives begin investigating people from Gee's past, enemies, etc. On their own, Pembleton and Bayliss begin their own investigation.
Munch and Billie Lou have a few words, but it isn't clear that it was Stu Gharty that caused their break-up, as Munch had explained to his colleagues in the Special Victims Unit back in New York.
While Gee is on the operating table, the surgical team becomes the victim of a second shooting. One theory that is speculated is that someone in the department might be responsible. Pembleton and Bayliss join Ballard and Stivers in their reviewing of videotapes. ME's Griscom and Cox stop at the hospital to theorize about the forensics of Gee's shooting, over Gee's still breathing body. MGee and Kellerman visit the old neighborhood to follow MGee's hunch, but Kellerman rightly identifies it as a dead end. Gee returns to consciousness. After Ballard and Stivers leave to pursue other leads, Pembleton sees a "puff a smoke" on one of the videotapes. Pembleton and Bayliss gives Gharty the news and some backbone (Gharty's a self confessed stooge for the bosses to get off the street), they visit the cameraman who was near the puff of smoke. The cameraman confesses to the Inner Harbor shooting. Later, Bayliss confesses to Pembleton that he killed Luke Ryland, but Pembleton doesn't want to hear it. Frank Pembleton comes in for one day and closes two cases, although we don't really know what happens to Bayliss after his confession. Meanwhile, the rest of the detectives gather at the Waterfront Bar to celebrate the closing of the case, but Brodie arrives bringing bad news, Gee has died as the result of an aneurysm. In the end, Gee finds himself playing cards in the break room with Crosetti, Felton and another empty chair.moreless