Told in intertwining memories spanning 15 years, Olly speaks to a therapist to try and make sense of how his recent sexually violent assault has affected his relationship to his polar opposite but caring brother Liam. When communication between the two of them creates a divide in their already fractured relationship, they take drastic action to not only make things right, but to break the cycles of guilt, shame, and trauma within their family. Told through the pretense of the popular British ‘punch for points’ game of Yellow Car, Liam's guilt, shame, and repressed understanding of his brother push him down a path of revenge, with the sight of every yellow car serving as a violent reminder of what justice looks like to him. 

Flashbacks of their childhood years of playing the game that always ended in Liam asserting his dominance through violence suggests a generational cycle that has been perpetuated even since they were young. As the story is pieced together, through the understanding of a repressed father, a deceased mother, and an uncommunicative pair of siblings, the story builds to a violent crescendo in which Liam strikes the assailant over the head with a hammer. Olly is then revealed to not be in a therapist's office, but instead in a family holding cell, confessing to a police detective.