When Mishti and Rahul arrive at Nana and Nani's home for the Diwali holidays, they expect sweets, lights and laughter. What they don't expect is to be swept into a world where marigolds guard doorways, oceans churn up treasures, gods battle demons, and a cow's roar can summon an army.As the evenings glow with diyas, Nana and Nani unlock story after story-from the fall of ten-headed Ravana to the night Kali danced in the darkness, from Krishna lifting a mountain to the promise between a brother and sister.