When Homer saves Mayor Quimby and Star Wars star Mark Hamill's lives during a sci-fi convention riot, the Mayor hires him as his personal bodyguard. Following Quimby around, Homer has to turn a blind eye to his new boss' corruption and bribe-taking. But when Homer learns that Quimby has allowed Fat Tony to supply Springfield Elementary with rats' milk, he confronts the Mayor and demands that the deal be broken. Quimby calls off the deal, but in doing so becomes a target for Fat Tony and his henchmen. When hitman Louie tries to kill the Mayor during a performance of Guys and Dolls (starring, coincidentally, Mark Hamill), Homer attacks the assailant and stops him. While Homer makes Quimby safe from Louie, Fat Tony takes the opportunity to beat the mayor repeatedly with a baseball bat.
