The powerful theme of Wilson's new play is stated: An adolescent Eurasian girl - the child of a union between an American GI and a Vietnamese woman, adopted by a wealthy California couple and obsessive in her search for her father - is drawn to the redwood forests of northern California, where thousands of Vietnam veterans have taken refuge to escape the harsh realities of life in America. It is a story of obsession and discover. Redwood Curtain was first produced in early 1992 at the Seattle Rep. In the spring it was presented by the Philadelphia Drama Guild and in January 1993 it appeared at San Diego's Old Globe Theatre. Each of the three productions was directed by Marshall W. Mason. When Redwood Curtain opens on Broadway at the Brooks Atkinson Theatre in late March, starring Jeff Daniels, Debra Monk, and Sung Yun Cho, that opening will mark the fortieth production of Lanford Wilson's work to be directed by Marshall Mason, the longest collaboration between a playwright and a director in the history of American theater.