Maria Callas, the greatest soprano of the 20th century, is known as "the Goddess of Opera". Her beautiful singing voice has sung numerous classics such as Tosca and Carmen. Her sad song of love with the Greek ship king and the entanglement with Jacqueline Kennedy that had never met but linked to fate also became an unprecedented song. In 2017, on the 40th anniversary of Karas's death, director Tom Wolf visited Karas's friends and related people for five years, unearthed and used a large number of precious private letters and video materials that had never been published before. "Karas: the Voice for Love" was filmed and produced, which brings us into her legendary life from Maria Karas's own perspective. In 2018, the film was released in nearly 30 countries, gaining global acclaim and causing a wave of nostalgia among music fans. In the film, a large number of precious live opera images and high-quality classic soundtracks are like visiting the metropolis in person to experience the shock of the legendary opera goddess Karas on the big screen and explore the legendary life of Maria.