Rajathanthiram The Piano Description:

When Arumugam was young, he discovered a priceless treasure that he hid it in a custom-made piano that can only be unlocked by playing a unique tune. He teaches the tune to his four children separately, all knowing only part of it. Later in life, he suffers from Alzheimer’s and forgets about the piano’s secret. However, the need to uncover the secret becomes vital when someone goes after the family for the treasure.