"Ocean" tells a story that is taking us from the European coast of the Atlantic, over the Caribbean to the Pacific and on to the Hawaii Islands. This film is a sort of diary. In a poetic way it reconstructs the moment of death of a close person by recording the events, or more precisely the lack of events, in a situation brought by the condition of the narrow space of the cargo ship in the endless space of the open sea. The protagonists' quest in crossing the ocean carries the story and the viewer on the journey through and towards the unknown, that acquires its shape in the glittering of the waves and the magnificent breadth of the horizon offered by the open sea.

在贝阿铁路（БАМ）建设中，一支掘进队负责挖掘隧道。影片的主角是掘进队队长康斯坦丁·巴萨尔金（Константин Басаргин），他声名远扬且颇具威望，其名字在工地之外也广为人知。然而，盛名让他有些飘飘然。一次，隧道里因地震发生了事故，而此时巴萨尔金却因私事请假离开了工地。

俄罗斯和美国海军正在联合开展一项海上救援行动，试图防止一场重大生态灾难的发生。这场灾难可能是由一个从俄罗斯走私出来的核反应堆引发的，该核反应堆在一架货机爆炸后坠入了太平洋。