Fifteen-year-old Parvathi (Annie) witnesses her family getting murdered by Jaganatha Varma (Narendra Prasad). She runs away from them to save her life. To prevent getting caught, she disguises herself as a boy named Thomas and starts living as a servant in a house of bachelors. One of the bachelors, Omanakuttan (Mukesh) discovers that Thomas is actually a girl. After hearing her story, Omanakkuttan and his friends try to help her. Before Jaganatha Varma could kill her, Policeman S. Narayanan (Balachandra Menon) discovers his plan and saves Parvathi.