Rose receives an offer to buy her building from a real estate magnate whose plan to renovate means tearing down 227.
Unimpressed with Brenda's wisecracking history teacher, Mary has words with the school principal.
In order to insure the success of a big construction deal, Lester swears Mary to secrecy about the identity of his famous houseguest/investor, the Marvelous Marvin Hagler, an effort that nearly sends Mary down for the count.
Mary throws a surprise birthday party for Rose but Rose has an even bigger surprise when she announces she has sold the apartment building.
