In Gujarat, an underground song pulls the Santos da Costa family into the breathtaking geometry of a centuries-old stepwell. Gabe is investigating water engineering and the legend of a singer whose voice still travels beneath the stone. Jivika, clever, stubborn, and every bit as competitive as Tala, refuses to let visitors confuse beauty with understanding. When echoes begin aligning with carved patterns, the triplets discover that the stepwell may hold a kind of record never written on paper. To follow it, they must combine mathematics, music, and trust - and decide whether a message sealed beneath stone belongs to the person who finds it or the people who kept it safe.
