Thomas gets tracked down by a seedy-looking private detective - to tell him that his long-lost father has died, and there may be something in it for him. He and Sally head south to the coast at Dungeness, on the trail of Thomas's half-brother, whom he hasn't seen for years to sort things out - who also stands to benefit. But things don't seem quite right, and soon they find themselves caught up in a trail of deceit and deception. Could it be that the sea air won't be exactly be beneficial for their health?
—canndyman