A young script writer named Chanthu has a mother who works in a huge mansion owned by her master Thampuran, whose daughter Indira is in love with Chanthu. Eventually, Thampuran finds out and forces Chanthu to end their relationship by making him write letters describing his love with an imaginary woman named "Vasumathi" in a fictional "Thottakkattukara" village. However, unknown to Chanthu, Indira and Thampuran, there exists a real Vasumathi in a real Thottakkattukara village, where she is about to commit suicide. Upon receiving the letters, Vasumathi begins to expect a savior by reading between the lines of it, and tells this case to her friend in hopes of getting the details of Chanthu. Through the direction of the letters, Vasumathi awaits for a departing Chanthu on a bus trip to Madras, but not before Chanthu reveals the truth behind the letters to his old school friend Pappan.