Rasathanthram is Sathyan Anthikkad's first film with Mohanlal in the lead after a gap of twelve years. The film also has the actor pairing with Meera Jasmine for the first time. With Bharat Gopi too doing a meaty role, this is the first Malayalam movie to have three national award winners performing in it.

Like other films of the director with Mohanlal in the lead, Rasathanthram too has the actor in the down-to-earth role of a carpenter called Premachandran. He is a good worker and is liked by the village folks. One day he meets Kanmani (Meera Jasmine), a girl of Tamil roots who is employed as a servant and is continually ill-treated by the family that employs her. Premachandran comes to her rescue. But this lands him into endless troubles and eventually into love.

Bharat Gopi plays Mohanlal's ailing father in the film. Typical of Sathyan Anthikkad films, Rasathanthram will have as much humour as it will have pathos.

Most of the film is being shot at remote locations in Idukki district. Cinematographer Alagappan faithfully captures the enchanting beauty of the location with rippling streams and rolling hills. This is his third assignment with Director Sathyan. The film is slated for release during Vishu.