The premise for DD5 has Mr. Big up to no good once again. Flo's diner is introducing a new fat-free breakfast with a huge sign atop the building. But Mr. Big comes along in the middle of the night and paints over the word "fat," leaving the restaurant to advertise a free breakfast. The next morning the diner is swarmed by countless customers and bursts from the sheer volume. So now Flo has to set-up outdoor makeshift restaurants around Diner Town in order to raise money to rebuild her diner.