鲟鱼鱼子酱是众所周知的顶级食材，却鲜有人知鲟鱼是世界上最大的淡水鱼类，而且已经在地球上存活了两亿年之久。作为鲟鱼中的一种，欧洲鳇鱼子酱是世界上最昂贵的食物，被称作黑色的黄金。然而这个族群现在却面临灭绝，环境污染、多瑙河航道改建及水电站建造都给它们的栖息地带来了灭顶之灾，使它们无法回到祖先们曾孵育后代的地方。本片对欧洲鳇以及其它鲟鱼目前的生存状况、科学家对其迁徙途径的研究和保护、与罗伯特·拉杜塔的私人渔场合作共同推进种群恢复项目等内容进行了介绍。这是第一部关于欧洲鳇的纪录片，或许也将是最后一部。

Desperately in need of money in hopes of regaining custody of his daughter, James (Joel Smallbone) embarks on a cross-country delivery for cash-no questions asked. But when he discovers what he is delivering is actually who, the questions in his mind begin haunting him mercilessly. James becomes an unlikely hero and must fight to save the innocence and lives of the two young women. One of which he finds himself falling in love with.