Traces the adventures and eventual disappearance of the enigmatic 17th-century voyager Robert Cavalier, Shier de la Sale -from the court of Louis the XIV in Paris, to fur trading outposts in Montreal, Canada, to the Spanish-controlled Texas Gulf coast.The documentary is set against the backdrop of the 1995 discovery and archeological excavation of La Sale's 300-year-old sunken vessel, The Belle, from the bottom of Matador Bay in Texas. Retracing one of the largest manhunts in American history, the program chronicles the four-year, 3,000-mile coastal search for La Sale and his band of pioneers.