Rajathanthiram: The Piano (2023)

A special piano hides a valuable secret. Years ago, Arumugam received a wooden box from an anonymous Englishman as a token of gratitude. Inside, he found a precious pink diamond. Instead of selling it, Arumugam and his piano-maker friend created a custom piano with a secret compartment, unlockable only by playing a specific tune. He taught the four parts of the tune to his four children. As time passed, Arumugam developed Alzheimer's, forgetting the piano’s secret. His family remained unaware until dangerous strangers learned of the piano and began pursuing Arumugam’s family for the diamond.