本片讲述了一个奇幻的冒险故事，从城镇来到城市的男孩，因为自己的怯懦无法适应全新的环境和交到好朋友，从而陷到手机的世界无法自拔，因为手机而带来的一场奇幻之旅。在异世界里他们有朋友，没有手机他们就是一群纯粹的在一起玩的朋友。
At17:00everyday,Andrew,amiddle-agedman,driveshomefromworkthroughMelbourne’soutersuburbsinpeak-hourtraffic.Occasionally,heoffersalifthometoayoungercolleague,David.Overayear,theirtentativesmalltalkgiveswaytoawarmfriendshipandopenconversationwithintheconfinesofthevehicle,incrementallyrevealingtheirlives.Onemaywonderwhatathree-hourfilm,setalmostentirelyinacarandshotwithafixedcamerafromtheback,candeliver?Theanswerisanunexpectedlyengagingandentertainingobservationoftherhythmsofdailylife,andacatalogueofsuburbanworries.Insensorialterms,ThePlainschartsthepassageoftimeastheseasonschange.Thepitter-patterofrainandthefamiliarcocoonofthecarprovideasenseofcomfortandsafetyfromtheoutsideelements.Thecaristheliminalspacebetweenworkandhome,asthedayispondered,thenightplanned.Documentaryelementsexistbeyondthewindscreen,asafictioncoursesthroughthevehicle.ThePlainsisaroadmovieunlikeanythingyouhaveseenbefore.
高宇蓁饰演性工作者，为了实现梦想，被卖到国外从事性工作。电影除了是对性工作者这一社会边缘群体的关注，也阐述女性议题。黄冠智饰演高宇蓁的弟弟；段钧豪、黄冠智饰演经常光顾茶室的警察；郭耀仁饰演茶室围事、也是妈妈桑的姘头；蔡嘉茵饰演妈妈桑。众人将共同演绎大时代底下边缘角落的小人物故事。
