India, 19th century: on the outskirts of a decrepit village called Tumbbad lives Vinayak, the stubborn, conniving bastard son of the village lord, obsessed with a mythical ancestral treasure. He suspects the secret lies with his great-grandmother, a cursed witch sleeping for centuries. Confronting her finally puts him face to face with the guardian of the treasure, an evil fallen god. What starts with a few gold coins, quickly spirals into a reckless, perpetual yearning, spanning decades. Vinayak's greed keeps escalating till he unearths the biggest secret of all, something more valuable than the treasure itself!