The fragile equilibrium between two rival street gangs shatters when David, a twin, begins experiencing inexplicable physical transformations. David finds himself caught in a surreal struggle as his arm uncontrollably shifts into various objects, including snakes and sausages, forcing him to navigate the dangers of his neighborhood while hiding his condition. His twin brother and the surrounding gang dynamics provide the primary obstacles, as the physical manifestations threaten to expose David and escalate local tensions. The narrative follows a linear progression, focusing on the absurdity of the transformations against the backdrop of gritty urban life.

Readers often note the unusual blend of gritty urban realism and absurd, almost slapstick fantasy elements present in the narrative. Discussion frequently centers on how the bizarre transformations serve as a metaphor for the awkwardness and lack of control inherent in the adolescent experience. Critics highlight the author's ability to maintain a consistent tone despite the strange premise, balancing the tension of gang conflict with the protagonist's physical plight. The pacing is generally described as brisk, keeping the focus on the immediate consequences of David's condition rather than long-winded explanations of the magic involved.