Trying to fix their damaged boat, Jacqui Sinclair and her family stop at a remote island that doesn't appear on any maps. They soon discover the horrifying secret that caused previous generations to hide the island's existence from the rest of the world. Many years ago, the island was the scene of an unspeakable tragedy. Ever since, a malevolent spirit has been lurking in the long grass, waiting near a bare wooden cross for its chance to gain revenge. For Jacqui and the others, their only hope lies in deciphering the clues left behind at a remote lighthouse, where a skeleton crew once tried and failed to defeat the same evil force. If they fail, the Sinclairs will meet the same grisly fate that has befallen all those who have made the fatal mistake of setting foot on Saward Island...