The novel revolves around the life of Ayyappan, a poor farmer who struggles to make a living on his small plot of land. The story is set against the backdrop of a traditional Kerala village, where the caste system and social hierarchy play a significant role in shaping the lives of the characters. Through Ayyappan's struggles, the novel explores themes of poverty, exploitation, love, and the human condition.

"Naalukettu" is a seminal work of Malayalam literature, written by Thakazhi Sivasankara Pillai in 1953. The novel is a powerful exploration of the complexities of human relationships, social hierarchy, and the struggles of everyday life in a traditional Kerala village. The title "Naalukettu" literally translates to "four cents," which is a reference to a small, insignificant plot of land that becomes a crucial element in the narrative.

"Naalukettu" is widely regarded as one of the most important works of Malayalam literature. The novel's exploration of themes such as poverty, exploitation, and social hierarchy continues to resonate with readers today. The novel's use of simple, yet powerful language has made it accessible to readers across generations.

One of the central themes of "Naalukettu" is the exploitation of the poor by the wealthy and powerful. The novel highlights the ways in which the landowning elite exploit the labor of the poor, perpetuating a cycle of poverty and oppression. Ayyappan's struggles to protect his land and livelihood are a powerful commentary on the injustices of the social system.