Senior marine biologist Dr. Lin Yuan leads assistant Su Qing and photographer A Zhe aboard the research vessel Explorer to the Pacific Blue Hole waters to conduct a deep-sea ecological survey. En route, they encounter a rare storm, causing the ship to lose power. The three are forced to board an inflatable life raft, beginning a drifting journey in the vast ocean. Relying on Lin Yuan's marine knowledge to navigate, Su Qing's emergency skills to survive, and A Zhe's camera to record hope, accompanied by waves, sunlight, and starlit skies, they gradually discover that drifting is not a dead end—they encounter migrating whale pods and drift-floating coral fragments.