Mac concocts a scheme to attract single women to rent Dennis's bedroom while Frank and Charlie make similar plans to draw in young European coeds, but neither ad attracts their intended target.
The guys are in the final preparation stage for an unknown scheme when Dee excitedly enters to inform them that today is "Dee Day" and the guys must do everything she wants without complaint.
Annoyed that the Gang failed to react as he nearly choked to death on an appetizer, Frank decides the Waiter, his savior, is the only person who has his back.
In the black-and-white noir world of his memory, Charlie navigates the seedy underbelly of Philadelphia as Frank has been "diarrhea poisoned," and it's up to Charlie to clean up the mess.
As a record-breaking heat wave overtakes Philly, the Gang plans to profit from global warming by pumping up the A/C so people will congregate at Paddy's and save energy at home.
When a trendy new hair salon opens up right next door to Paddy's, Dennis and Frank go on the offensive to stop women from cutting off their hair. Meanwhile, Mac is reunited with his childhood dog Poppins.
Dennis and Charlie stand guard at the entrance to their laser tag base waiting to ambush the legendary "Big Mo," but Dennis begins to ponder the reasons they play laser tag and if their pursuit of a victory is worth their effort.
