The plot follows an older girl who sees a younger girl crying while writing in her diary at a park bench. When the older girl tries to comfort her, the younger girl runs off and leaves her diary behind. Intrigued, the older girl reads the diary and discovers the younger girl is being bullied at school. Over several months, the older girl searches for the younger girl by her bracelet but is unable to find her. The character profiles describe the younger girl dressing casually with a backpack and the older girl dressing more sophisticatedly to show their age difference. Key locations include the park bench, the younger girl's bedroom, and street scenes on Oxford Street.