When Countrywise presenter Paul Heiney's son Nicholas committed suicide aged 23, Paul and his wife, Times columnist Libby Purves, were rocked to the core. Nicholas had been a highly gifted promising young man, albeit he had struggled to keep his head above water at times as severe depression slowly dragged him down over many years. Nicholas was a keen sailor, with several of his posthumously-published writings having a nautical theme. To try to reconnect with this happier memory of his son, Paul decides to set out - alone - on a voyage he would have liked them to have embarked upon together....