以巴克队长为领导核心，小队集结了医生、生物学家、摄像师、机械工程师等7名伙伴。他们是一群活跃在海底的小小冒险家，有着各自的爱好与独一无二的特长，在团队核心巴克队长的带领下向着未知的海域不断探索前进。精致的画面呈现与天马星空的想象力，更增添了动画的观赏性与趣味性。

　　The Octopod is grabbed by a colossal squid. The Octonauts are unable to break free due to the hooks on the ends of the squid's tentacles. Fortunately the arrival of some sperm whales turns the squid from hunter to hunted.

　　Kwazii and Dashi become entangled in a strange deep-sea creature - a siphonophore - and when a geyser blasts it toward the surface, the Octonauts must stop its ascent before it fatally bursts.

影片讲述了年轻勇敢的银龙Firedrake、山神Sorrel、孤儿Ben，因银龙的家园无法继续居住，共同踏上去喜马拉雅山脉寻找着天堂谷——传说中龙族避风港的冒险之旅，在这段神奇的旅程中，他们遭遇了各种险境，并经历了友情危机，最终冰释前嫌收获了各自的成长。