该片编剧为法雷利和《绿皮书》的联合编剧Brian Currie及Pete Jones(《嘿咻卡》)，改编自纪实书《The Greatest Beer Run Ever: A True Story of Friendship Stronger Than War》，讲述John "Chickie" Donohue的真实故事：越南战争时期的1967年，26岁的前美国海军陆战队成员Donohue从纽约出发，去越南寻找正在当兵的三个儿时好友，给他们送去啤酒。

Tony Lip, a bouncer in 1962, is hired to drive pianist Don Shirley on a tour through the Deep South in the days when African Americans, forced to find alternate accommodations and services due to segregation laws below the Mason-Dixon Line, relied on a guide called The Negro Motorist Green Book.