阳光透过窗帘洒进房间，七岁的玛丽正躲在浴室里闹脾气——她坚决不肯穿上那件为开学第一天准备的衣服。舅舅弗兰克（克里斯·埃文斯饰）蹲在门外耐心哄劝，身旁独眼猫弗雷德懒洋洋地甩着尾巴。这个佛罗里达小镇的清晨，就此拉开了一段关于天才与平凡的温暖博弈。
当数学神童遇上一年级课堂
玛丽在史蒂文森老师的数学课上如坐针毡。当同学们还在掰着手指算加减法时，她已脱口说出复杂乘除的答案，甚至能迅速推算出平方根。校长闻讯赶来时，这个扎着马尾辫的小姑娘直接大喊："快叫我舅舅来！"——这个场景完美诠释了何为"智商碾压"。放学后，老师追出来向弗兰克透露，玛丽掌握的"特拉亨伯格速算法"通常是大学生才会接触的高阶技巧。
海滩日落时分，弗兰克一边修理渔船，一边教导玛丽处理冲突的正确方式。观众此时才意识到，这个看似散漫的修船工，实则是波士顿大学前助理教授。当他每周五在酒吧独饮时，总会有意无意看向墙上泛黄的微分方程海报，暗示着这个监护人同样有着不平凡的过往。
一记教科书引发的风波
校车上的冲突戏码令人捧腹又心疼：玛丽为保护同学被弄坏的手工作业，抄起课本砸断了霸凌者的鼻梁。当校长提议将玛丽转入天才学院时，弗兰克的拒绝掷地有声："解得出黎曼猜想不代表她不需要跳房子游戏。"这个场景中，玛丽带领全班为受欺负同学鼓掌的桥段，展现了编剧对儿童心理的精准把握。
随着外婆伊芙琳（琳赛·邓肯饰）的突然造访，剧情转向更深层的探讨。她带来的笔记本电脑与弗兰克简陋的木屋形成刺眼对比，而那句"你母亲会怎么想"的质问，揭开了这个数学世家最痛的伤疤——玛丽母亲黛安的自杀。当法庭辩论揭示弗兰克曾因斗殴入狱时，镜头扫过他布满老茧的双手，暗示这个放弃学术生涯的男人，正用最笨拙的方式守护着妹妹的遗愿。
藏在方程里的母女密码
影片最动人的转折出现在波士顿的数学研究所。当白发教授轻蔑地断言小女孩"看不懂纳维-斯托克斯方程"时，玛丽不仅指出错误，还当场补全了推导过程——这正是她母亲毕生钻研的世纪难题。导演用特写镜头捕捉玛丽指尖划过母亲遗稿的瞬间，那些泛黄纸页上的公式，成了跨越生死的特殊对话。
最终对决在养父母家的花园展开。弗兰克亮出黛安未发表的完整证明，提出残酷交易：要么放弃抚养权让论文立即发表，要么带着秘密入土。伊芙琳颤抖着拨通教授电话时，观众才惊觉——这个强硬的老妇人毕生所求，不过是女儿学术成就的承认。
结尾处，玛丽抱着三只猫奔跑在大学校园与游乐场之间，完美呼应了黛安日记里的那句话："真正的天才，是既能解宇宙方程，也会为冰淇淋开心。"影片用温柔笔触告诉我们：童年不该是简历上的镀金，而是混合着粉笔灰与青草香的珍贵时光。
（译文）
Sunlight filters through the curtains as seven-year-old Mary stages a bathroom rebellion - she adamantly refuses to wear her first-day-of-school outfit. Uncle Frank (Chris Evans) kneels outside the door coaxing her, their one-eyed cat Fred lazily flicking his tail. In this Florida coastal town morning, begins a heartwarming battle between genius and normalcy.
When Child Prodigy Meets First Grade
Mary fidgets in Ms. Stevenson's math class. While classmates count on fingers, she effortlessly solves advanced equations and calculates square roots. When the principal arrives, the ponytailed girl shouts "Call my uncle!" - a perfect demonstration of intellectual dominance. After school, the teacher reveals to Frank that Mary's "Trachtenberg method" skills typically belong in college classrooms.
During a beach sunset, Frank repairs fishing boats while teaching Mary conflict resolution. Audiences then learn this seemingly carefree handyman is actually a former Boston University professor. His Friday night bar rituals always include glancing at faded differential equation posters, hinting at his own extraordinary past.
The Textbook Incident
A school bus confrontation blends humor and pathos: Mary breaks a bully's nose with a textbook defending a classmate's ruined diorama. When the principal suggests transferring Mary to a gifted academy, Frank's refusal resonates: "Solving Riemann hypotheses doesn't mean she should miss hopscotch." The scene where Mary leads classmates applauding the bullied boy showcases the writer's grasp of child psychology.
Grandmother Evelyn's (Lindsay Duncan) arrival deepens the narrative. Her laptop gift contrasts sharply with Frank's rustic cabin, while her "What would your mother think" barb exposes the family's deepest wound - Diane's suicide. When court proceedings reveal Frank's assault record, calloused hands close-up shows this man abandoned academia to honor his sister's wish.
The Mother-Daughter Equation
The most poignant twist occurs at Boston's mathematics institute. When a professor dismisses the girl's understanding of Navier-Stokes equations, Mary not only spots errors but completes the proof - her mother's lifelong work. The close-up of Mary's fingers tracing her mother's yellowed manuscripts transforms formulas into a cross-generational dialogue.
The final confrontation unfolds in foster home gardens. Frank presents Diane's complete proof with a brutal ultimatum: relinquish custody for immediate publication, or let it die with her. As Evelyn tremulously dials her colleague, audiences realize - this stern woman only ever wanted academic recognition for her daughter.
The epilogue shows Mary juggling college cats and playgrounds, perfectly echoing Diane's diary line: "True genius solves cosmic equations and celebrates ice cream." The film gently reminds us: Childhood shouldn't be resume gold-leafing, but precious time scented with chalk dust and fresh grass.