India, Dec. 12 -- The promotions of Malayalam superstar Mohanlal's next, Vrusshabha, have officially kicked off with the release of the first song from the film. Appa, the heartbeat of Vrusshabha, an emotional track about the timeless bond between a father and son, composed by Sam CS, has been released in Malayalam, Kannada, Tamil, Telugu and Hindi. The video song features Mohanlal, Samarjit Lankesh, who plays his son, Ragini Dwivedi and Nayan Sarika.

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The song has Mohanlal's character reminiscing about his bond with his son, after being forced to leave the latter at a mental health institute. Samarjit is seen writhing on a bed that he's been...