Mazhathulli Kilukkam movie is about Soloman alias Soman (Dileep) who comes to a hill station to be the manager of an estate in Coorg. He reaches the house on top of a hill-‘Swargam’ where he finds that only two old women, both retired teachers live alone with a cook and a home nurse to look after them. Alice (Sarada) and Anna (Bharati) are sisters who are spinsters and they own the huge estate.
The home nurse, Sophie (Navya Nair), cook (Sukumari), her son (Cochin Haneefa) and the priest (Nedumudi Venu) are the only people close to them. Soman takes charge as the manager and soon wins over the two oldies. He realizes that they are two angels and he tries to bring back joy into their morbid life. Soon, Soman becomes the apple of their eye and they both consider him as their own son.
Meanwhile he falls in love with the home nurse Sophie with whom he had regular fights. Their wedding is fixed and the sisters give away all their wealth to both of them. But, Soman has a dark and disturbing past. He is the main accused in a murder case and actually he is hiding from the police.
What is his past? Why does Sophie turn against him? And what happens to the two old ladies? All this is told in a mind-spinning climax, which turns out to be hysterical.