Join Ben & Fee Mac Tavish & their friends as they set off for the Caribbean. Their routine of seamanship & snorkelling, kitesurfing & diving is soon interrupted when Captain Macbeth comes into possession of an old nautical chart. When the map is stolen & a new Tobermory recruit jumps ship, Ben, Fee & their friends decide to investigate. But danger lies all around as they follow their quarry to the mysterious Shark Island.. .