It should be Homer getting caught up in the Mafia again, but this time he gets made and while fat tony is in prison ( due to some circumstance ) homer becomes the boss. now the police cannot catch him, and the crime rate is skyrocketing. The only way the police think they can catch the new 'Don' is by getting Marge back on the Police force. Now marge will have inner conflict of course because as much as she loves Homer and doesn't want to turn him over to the police, she knows what he is doing cannot end well, and that she maybe the only one with the ability to bring him in safely.Meanwhile Bart, looking up to his fathers newfound respect and position in the underworld has started his own school yard mafia, which even gets principal skinner to work for them due to various favours. Lisa is going throught close to the same emotions as Marge, and she joins the hall monitors with other students to rally against the increasing violence and theft.
just a thought