Blackwaterfoot resident Joe Grant suffers from Parkinson's disease. He plays Bridge and at one session, as it closes, he encounters two well dressed Charity Workers. They drive him home in the rain. But are they really who they say they are? Joe travels to mainland Ardrossan where he is met by a precognition agent acting for the Procurator Fiscal in Ayr. He expects he is the prime Court witness. But he does not get to give his evidence. He disappears. Yet in his disappearance, he finds much satisfaction with his new acquaintance. Can he be traced? And if he is found, could he give evidence against his new friend?