Clara Feutageaux is beginning her first day as an algebra teacher at Emerson High School. But she has worn an outfit that resembles the school uniform, and she can't quite convince her students she's their teacher. Clara's search for respectability is further complicated by her sister Carla, who seems quite content at a far less reputable job. It doesn't help that they are roommates, and it really doesn't help that they are identical twins - twins...