The film is loosely based on the novel, Yakshi, by Malayatoor Ramakrishnan written in 1969. A Yakshi is a female demon who, in the guise of a beautiful woman, seduces men and drinks their blood. Though firmly rooted in the culture of Kerala, the demonisation of female sexuality is a universal phenomenon and finds reverberations in myths of other cultures around the world, like that of the Succubus, Yuki-onna, Incubus etc.

Akam is the story of Srini, a young architect, who starts suspecting that his beautiful wife is a yakshi.

Akam, the film, is a contemporary retelling of a classic that is
embedded in the Malayalee psyche.