[5] She was part of the Tony Randall's National Actors Theatre company, and performed in their production of Saint Joan by George Bernard Shaw in 1993 on Broadway.

[6] She performed in the National Actors Theatre productions of A Little Hotel on the Side by Georges Feydeau and Maurice Desvallières on Broadway in 1992,[7] and in The Seagull by Anton Chekov in 1992.

[8] Plunkett appeared in the television movies The Littlest Victims and Breaking the Silence, and in feature films including Claire Dolan and The Company Men.

She and her husband, actor Jay O. Sanders, appeared together in all four of Richard Nelson's The Apple Family Plays: That Hopey Changey Thing, Sweet and Sad, Sorry, and Regular Singing.

[13] Plunkett and Sanders appeared in all three productions of Richard Nelson's second play cycle, The Gabriels: Election Year in the Life of One Family, which premiered at The Public Theater.