Retired school-teacher Sonia Kidwai did not set off from home to become a hero. Yet, she felt she had no choice but to confront a violent mob thrashing a young man on a crowded Delhi road in broad daylight, even if she found herself all alone. "Where is our humanity?" she asks. "What has happened to the basic value of kindness? Even if this story inspires two people to stand up and protect the vulnerable, I will be satisfied."