The Last Letter is a heart-wrenching story about Saaraa, a 16-year-old girl from Colombo, Sri Lanka, who faces the pressures of school, friendships, and an emotional crisis triggered by a series of threatening letters and gifts. A bright student, Saaraa begins her science class with hopes of improving her grades. She is close to her friends, Sathsarani and Vidu, who support her through the challenges of school life. As her academic performance improves, she unknowingly attracts the attention of someone who becomes obsessed with her.
Trouble begins when Saaraa receives a cryptic note from an anonymous admirer during her extra science classes. Although initially confused, she follows her teacher's advice to ignore it. However, when a gift is left for her, Saaraa becomes increasingly anxious. Her friends, Sathsarani and Vidu, notice her distress and try to comfort her, but the tension only grows. One day, Saaraa finds another disturbing note, escalating in tone and content, telling her not to go to the washroom alone, warning her against going to the fourth floor, and threatening her safety if she confides in anyone.
Despite her best efforts to stay calm, the weight of the threats becomes too much for Saaraa. Her friends and teacher, though concerned, cannot intervene in time. Saaraa's emotional distress peaks, and in a moment of hopelessness, she takes her own life by jumping from the school's rooftop. It is only after her death that the person responsible realizes the depth of their actions, filled with immense regret and guilt.
The Last Letter explores the consequences of bullying, emotional support, and the irreversible harm of neglecting mental health.