Plaza Suite is a confection of threee witty comedic episodes starring one of America's finest comic actors. Walter Matthau. The scene is Suite 719 of New York City's Plaza Hotel. In the first scene, Matthau's wife (Maureen Stapleton) discovers that he is fooling around with his secretary. In the next episode, Matthau portrays a producer who calls an old flame for a rendezvous - but the lady has more on her mind than romance. In the final sequence, Matthau and Lee Grant are the frustrated parents of a bride-to-be who has locked herself in the bathroom - moments before the wedding!