In 1975, Duncan's, a fast-food restaurant owned by Norm Duncan in the tiny hamlet of Scotland, Pennsylvania, hosts a variety of workers. Joe “Mac” McBeth is passed over for a promotion to manager by Douglas McKenna, who has been embezzling the restaurant's money. Three stoned hippies, one a fortune teller, inform Mac that they see a bank drive-thru style restaurant in his future as management. Mac and Pat McBeth then play informants on McKenna, and Duncan recognizes the value of Mac's efforts on behalf of the restaurant. Duncan shares with the McBeths his plans to turn his failing burger joint into a drive-through, and Mac realizes how profitable the drive-through could be, after which he is hit in the head with a refrigerator door and passes out briefly. Pat then decides to murder Duncan in a staged robbery. Mac and Pat attack Duncan to acquire the combination to the restaurant's safe, and Mac assaults Duncan, but is distracted by a vision of the three hippies, allowing Duncan to fall head first into a deep fryer that splatters and burns Pat's hand. Investigator McDuff arrests a local homeless man, to whom Pat has given Duncan's jewelry, and the restaurant is willed to Duncan's eldest son, Malcolm. Malcolm sells the restaurant to the McBeths who immediately realize Mac's ideas, and the restaurant's business takes off.