Two drunk teenagers start harassing an old lady on a bus until a homeless man steps in and stops them — and it transforms his life.

Molly walked up the steps into the bus with great difficulty and was grateful when she felt a strong hand under her elbow, helping her up. She turned her head to smile her thanks and cringed.

The hand cupping her elbow belonged to a tall thin scarecrow of a man, clearly homeless, and none too clean. Molly jerked her arm away from the man and said stiffly, “Thank you.”