John sees a dead man walk but can make no sense of it. He thinks he has a mental issue, or maybe, like his friend, he is becoming an alcoholic, but perhaps what is really happening to him is beyond belief. His problems start with blackouts, memory loss, and moments, sometimes days, of total confusion. These occur throughout the book, some dramatic, others very ordinary. He tells us of his fears and we accompany him on his journey as he dismisses the possibility of mental illness and looks for the explanation elsewhere.Much of the dialogue takes place on a small yacht and it is there that John meets up with a stranger, Michael, who once worked at CERN. John, having a scientific background himself, is more than impressed by this man's intelligence and scientific knowledge. Along with others they go sailing and we begin to find out about their personalities and different views. Michael, who is part of a sect, tells John he is having 'episodes' - mixing up moments in his life. He adds that he will need many such experiences before he is ready to accept a new truth - we are all part of the multiverse and when we make a choice, whether knowingly or unknowingly, we create a new branch with new possibilities and we coexist in them all. John's life soon takes on a different meaning and he prepares for a new role helping others. Everything now makes sense, death dying and suffering. He is told he is gifted, one of those able to grasp the truth about reality - we all live on forever. He is a good man but not a saint and we learn more about him when he finds out his wife Penny is diagnosed with cancer, and he too ends up in hospital. Near the end of the book, having come to terms with his revelation, he meets up with others like himself. His enlightenment and new understanding are completed, following dramatic events on a voyage across the Irish Sea.