In the early 1980s, Ted Boynton, an earnest and somewhat neurotic American salesman, is living in Barcelona to promote his company’s products. Ted leads a quiet life, often reflecting on his own inadequacies and harboring a deep resentment towards his more charming and sociable cousin, Fred. Unexpectedly, Fred arrives in Barcelona as part of his duties as a U.S. Navy officer. The two cousins are forced to navigate their strained relationship while dealing with cultural misunderstandings and anti-American sentiments prevalent in the city. As they attempt to understand each other's worlds, their differing personalities frequently clash, adding tension to their interactions and mutual acquaintances.

As Fred's actions draw unwanted attention from both locals and American expatriates, Ted becomes increasingly involved in the complexities of balancing personal ambition with family loyalty. Amidst political tensions and romantic entanglements with local women, their relationship is tested in various unforeseen ways. Ted's introspective nature contrasts sharply with Fred's brazen confidence, exposing underlying personal conflicts. Through a series of awkward social encounters and heartfelt conversations, their experiences in Barcelona ultimately become a profound journey of self-discovery and reevaluation of their bond.