影片讲述了刚步入青春期的小女孩莱莉脑海中的复杂情绪进行的一场奇妙冒险。在她的大脑总部,正经历着一场突如其来的大拆迁,为意想不到的新情绪腾出空间。一直以来配合默契的情绪小伙伴乐乐(艾米·波勒 Amy Poehler 配音)、忧忧(菲利丝·史密斯 Phyllis Smith 配音)、怒怒(刘易斯·布莱克 Lewis Black 配音)、怕怕(托尼·海尔 Tony Hale 配音)和厌厌(莉萨·拉皮拉 Liza Lapira 配音),在新情绪焦焦的突然到来时变得不知所措,并且她看起来不是孤身一人。
Nothing is more frightening, as the narrator points out, than a ‘time-rich nosy person’. Exhibit A is Ahn Geo-ul (Gyeong Su-jin), who commits herself to social justice causes with terrifying tenacity. After temporarily renting a unit in the Baek-sae Apartment building, she discovers that a loud, hard to locate banging noise occurs from 4am every night, making the residents’ lives an insomniac hell – and so she determines to engage in her own disruption and to find the culprit of this acoustic assault, simultaneously eliminating her eccentric neighbours as suspects, and recruiting them to her cause. Focusing on a woman who is an unstoppable force for good, it is also a plea for community cohesion and solidarity.