Joseph A. Garcia / Star staff Peter Bellwood, left, portraying Ashford Marcuse, dances with Eryn O'Loughlin, who plays Katherine Elgin in "The Paper Castle," a play written by Bellwood's daughter Lucy and being presented at Theater 150 in Ojai.

From the fertile mind of 17-year-old Lucy Bellwood comes "The Paper Castle," an engaging play about a developing camaraderie that crosses generations.

Bellwood, who just graduated from Happy Valley School in Ojai, brings a mature understanding of characters whose quirks bring them together while distancing most of the more strictly reality-based people around them.

Bellwood's play, directed by John Diehl, centers on Ashford Marcuse, a 69-year-old widower, and Katherine Elgin, a 14-year-old student of medieval battle skills and chivalric style. Their lives are drawn together when Katherine, re-creating methods from her favorite era, shoots a flaming arrow and burns down Marcuse's barn.

She arrives on his doorstep to perform compensatory chores — and Marcuse can use the help.

His home and life are in shambles after the loss of his wife, while his son seems primarily interested in settling financial affairs.

But the kind of help Katherine ultimately provides, and the more subtle help Marcuse gives her, can't be easily totaled on a calculator. Each fills an emotional and intellectual need of the other.

Katherine meets a sympathetic acceptance of her nerdy lifestyle (classmates don't understand her medieval fixation) and responds with equal respect for Marcuse's obsessions: He pieces together his life with collages and is periodically shaken by compelling memories from his experiences in the Vietnam War.

A war theme is subtly woven into the text, from Katherine's idealized version of medieval battles through Vietnam to the present.

The playwright is immensely helped by the performance of her father, writer and actor Peter Bellwood, as Marcuse. He portrays Marcuse as confused but wily enough to keep his secrets and cling to his good memories while wracked with the bad.

Equally effective is the straightforward, charming portrayal of Katherine by Eryn O'Loughlin, 15, a junior at Happy Valley. She exudes the sincerity of a true believer as she rhapsodizes about the virtues of the Middle Ages, "the only time when anyone had any sense," when "there were rules" — a tidy but understandable take on the period.

Ron Feltner, as Marcuse's son, Alex, manages to balance a personality at odds with his father's determined eccentricity with a final sense of relief at his father's acceptance. Ron Segal is Marcuse's sympathetic doctor.

"The Paper Castle" plays out on a beautifully detailed set by John Mirk that reflects both the chaos of Marcuse's life and the fantasy that fuels the May-December friendship. Costumes, primarily a ratty robe with debris scattered over it for Marcuse and a medieval page's attire for Katherine, complement the play's subject matter.

The play's leisurely pace, as presented on opening night, suits the characters' thoughtful, unhurried lives. A new ending that had been pieced together just hours before the performance was carried off well, but might have accounted for an almost too neat revelation and reconciliation scene.

However, for a play with so much going for it — wit, humor and compassion — there's little to quibble about. "The Paper Castle" is engrossing.

Deb Norton, Bellwood's teacher and mentor at Happy Valley School, helped nurture the play to fruition. She is co-executive producer and co-artistic director of Theater 150 with Chris Nottoli.

— E-mail Rita Moran at ritamoran@earthlink.net.