Gary Irvine's wife refuses to sleep with him, so he pursues an even stingier mistress: golf. But despite his spending unconscionable amounts of time and money, his game is wretched. Until the day he takes a perfect swing . . . and then everything goes black.

After waking up from a coma a few weeks later, with a golf-ball-sized dent in his temple, Gary discovers that his last perfect swing has been imprinted on his brain. However, his newfound prowess is accompanied by some troubling side effects, most noticeably Tourette's.

As Gary miraculously advances to the final round of the British Open, his delinquent brother, Lee, stumbles from one botched drug deal to another, his orbit drawing ever nearer to the terrifying local crime lord Ranta Campbell. With their lives on the line, Gary and Lee must rediscover the ties that bind to survive a blood-soaked final round.