On 11 July 2007, archaeologist Dominique Görlitz and his crew of ten set sail from North America to Europe on a vessel made of 10 tons of bundled reeds and rope. They are determined to show the world that our Stone-Age ancestors were able to cross the Atlantic in both directions as many as 14,000 years ago. The film documents the crew's departure from New York City and the following journey on the high seas. The gripping adventure is intercut with excursions into archaeology, botanics, climate research and paleo-astronomy, which help us understand the complex and compelling reasoning that has led Görlitz and his team to attempt this daring project.