A Song Unsung is a mystery story about a family tragedy that happened fifty years ago. Everyone believed the Mishra family died naturally, but Aarush, a smart and determined investigator, feels something is wrong. When he studies the case, he finds similar deaths happening again. With the help of Sanvi, a careful and intelligent partner, he discovers a dangerous group that secretly causes these deaths by creating stress and fear. As Aarush and Sanvi follow the clues, they face danger, hidden enemies, and growing feelings for each other. Together, they must uncover the truth and stop the cycle of tragedy.