Michael is a Scottish gang enforcer grieving the violent death of his son, Ryan. Encouraged by his boss to get back to work, Michael sets off across Glasgow to find Ross, the boy who convinced Ryan to steal drugs belonging to Michael's boss. As Michael hunts Ross, he pushes away memories of Ryan and details of the events that led to his death. But when he finally comes face-to-face with Ross, Michael finds that the consequences of his own violent actions are impossible to escape.