Let Me Tell You How It Isn't follows the life of 22-year-old Justin Murphy as he searches for his estranged Lebanese father through London. Raised primarily by his Irish Catholic grandparents in Los Angeles, Justin struggles to identify with a Middle Eastern heritage he knows little about and refuses to accept. As a result, he embarks on a booze-fueled journey of self-discovery—but he isn't alone. His Jain girlfriend—a vociferous critic of his drinking—is along for the ride that leads them across Europe and down into the depths of their own relationship.

Let Me Tell You How It Isn't is the story of a young man's internal and familial struggle between Middle East and Far West in a "secondary security screening" world. It is a story of culture clash, identity, and love, all of which can tear a family apart and bring them back together.