In the 1980s, a teenager named Dom becomes fascinated with the lifestyle of football casuals after meeting Bex, the top boy of a notorious firm. Dom is initially drawn to the camaraderie and excitement that the gang offers. He enjoys their nights out, fashionable clothes, and the adrenaline rush of clashes with rival gangs. As he becomes more involved, his desire for acceptance and status within the group grows stronger. Dom befriends Bex, who takes him under his wing, seeing potential in the eager youth. This new relationship with Bex forces Dom to navigate the complexities of loyalty, respect, and personal identity.

As Dom gets deeper into the firm’s activities, he starts to witness the darker, more violent side of their operations. His relationships with his family and non-gang friends become strained as he finds himself increasingly caught up in dangerous situations. The allure of the casuals' life comes at a high cost, leading Dom to confront tough choices about loyalty and morality.