'Now Susan,' Mother said, 'And you too, John. No night sailing...No
going outside the harbour...And back the day after
tomorrow...Promise.' But promises can't always be kept. Within
twenty-four hours John, Susan, Titty and Roger find themselves
fighting a night gale in the treacherous waters of the North Sea,
adrift and in the main shipping lanes. Suddenly, it's real
adventure and only their sailing skills can help them now...