A decade ago, a blast rocked Hisano's residence, narrowly missing her due to a collision with a boy in grim attire on a bicycle. The memento she clutches, a toy scale dropped during the incident, has since been her talisman. Fast forward to high school, where a teacher's untimely demise prompts a police inquiry. A mysterious youth emerges, brandishing the long-lost scale, raising questions: can he share in Hisano's haunting visions? Threads intertwine as a cryptic web unravels, hinting at a profound interconnection.