故事背景设定在由大型企业出资设立的私立诚进学园。在这个推崇数字化管理、师生评价透明化的“令和教育现场”，52岁的鬼塚英吉将出任班主任。面对只关注社交平台信息、缺乏真实交流的学生，以及被考评制度束缚的教师群体，这位曾因特立独行而多次被开除的传奇教师，将再次用他那赤诚且充满冲击力的言行，直击当代教育的病灶。
以真实案件为基础，采用纪实风格，借单元案串联剧情。全片紧扣声纹技术破案视角，通过对声音线索抽丝剥茧，破解单元谜案、挖掘关键信息、揭开被掩盖的真相。影片以快节奏叙事与细节铺陈，凸显声纹破案的独特魅力，既展现警察对正义的坚守，又将人物命运融入案件之中，让观众沉浸式潜入声音的世界，感受悬疑与宿命感的交织。
As Leo's replacement Thomas Chamberlain arrives Nikki investigates the murders of Rachel Freedman, shot in the head, and her little autistic son Nathan, who was poisoned. Nikki rejects policewoman Anne Burchett's theory that Rachel killed them both but is perturbed when an impostor, claiming to be Rachel's sister, visits the morgue. At the same time the disfigured corpse of Eva Liron is discovered, killed with the same poison as Nathan. She had been the nanny to French hot shot footballer Isaac Dreyfus and was planning to blackmail him over a sex tape of them both. Jewish Isaac is a controversial figure due to his anti-Muslim sentiments but he denies ant part in the murders. Then another victim, Isaac's agent Mousa, is discovered dead.
本作改编自網戸スズ的同名漫画，是一部以“心机可爱”为武器在恋爱和人生中屡战屡胜的主人公为中心的爱情喜剧。 故事始于学生时代起就过着“无敌受欢迎”人生的松嶋琴音面前，出现了“高级心机可爱女子”佐原奈津奈。因奈津奈夺走了周围所有的关注与好感，琴音初次品尝到失败的滋味。甚至连她瞄准的帅气上司清水将贵也被奈津奈吸引。而奈津奈自身也认为琴音不容小觑，一场赌上自尊的“心机可爱”VS“心机可爱”的激烈对决就此拉开帷幕。
