For playwright Eugenie Chan, “Sojourner ZY: An Asian American science fiction fantasy” is a break from the norm in more ways than one. The San Francisco-born author’s works have been set in the past (such as “Madame Ho” about the infamous Chinatown madam) or the surreal present (her diptych of one-acts “Bone to Pick” and “Diadem”). But “Sojourner,” premiering this week […]