Robert Turner thinks he's happy in his marriage and his life. OK, he might have to work at things a little with his wife Claire - try to balance the commitments of their home life with his commitments at work and at the gym, where he is good enough to box at pro level - but, on the whole, he is happy.And then strange things begin to happen. Claire's behaviour starts to concern him; arguments become frequent. She nearly has his dog put down. They work through their problems together and all seems well, but then, from out of nowhere, a truck ploughs into him when he is out driving and he is nearly killed.Even stranger is the voice he hears, trying to warn him of something. He can't make out the words, but he hears it in the boxing ring and over the phone. He encounters a shadowy figure in the park, gone as instantly as it appeared. As the attempts on his life become more bold, Robert struggles to understand what is happening to him. The life he thought he was happy with is about to come crashing down around his ears...