Reviewed by David Rooney
The conviction of Tovah Feldshuh's transformative performance drives <cite>Irena's Vow</cite>, but it's the compelling true story of courage and heroism that makes Dan Gordon's by-the-numbers script so moving. Recounting the experiences of Irena Gut, a young Polish Catholic housekeeper who sheltered a dozen Jews in the basement of the German major for whom she worked during WWII, the play draws its power more from th…