Everyone thinks Will Warden is crazy to believe an old photograph, a rusted key, and a rune stone can somehow prove his father is still alive. And the thirteen-year-old is starting to think everyone might just be right. After his father vanishes in a mysterious explosion, Will travels to a seaside orphanage where a series of bizarre clues lead him to a perfectly preserved Viking ship buried in the dunes. With two competing secret societies and a treasure-mad...