When Alex, an alcoholic misfit, fails to prevent a violent crime against a young woman called Jenny, she is plagued by guilt and vows to find those responsible. As she slips into a moonlit world of crime-fighting fantasy, she soon begins to indulge her worst sociopathic impulses and vents her anger on anyone who rubs her up the wrong way. Just as her infatuation with Jenny flourishes into a brittle relationship that offers her a chance for redemption, Alex's lies and reckless behaviour catch up with her and make her the target of an even more deranged vigilante.