When the Dunne family pack their bags for a relaxing sailing holiday, all they have in mind is the sun and sea. But as a violent storm breaks out, the boat vanishes without a trace and the family are lost, presumed dead. Until now.

When a message in a bottle is washed up on a shore, it becomes apparent that there must have been at least one survivor. Who has survived and just what happened to the boat? As it transpires there may be more sinister powers at work, the race is on to rescue the family and discover what happened aboard the luxury yacht....