Calendar movie tells about the bonding between a mother and her daughter. Thankam George (Zarina Wahab) who is a college lecturer, was widowed when her daughter Kochurani (Navya Nair) was just three years old. She decides to live the rest of her life just for her daughter. She brings Kochurani up with utmost love and care.
But when Kochurani is in her youth, two men come into the lives of this mother and daughter. One is a young guy named Sojappan (Prithviraj) while the other is Dr. Roy Philip (Mukesh) . Sojappan is a pleasant guy who has his family based in the U.S. Roy Philip, who was earlier in the U.S, had married a foreigner. But his mother has compelled him to give up his wife and return home, to Kerala. Roy is a lover of music.
Movie take a new turn when these two guys make their entry into the lives of Thankam George and Kochurani.