Chen Mo, a young man with mediocre talent, pursues his dreams persistently in a cold swimming pool. Faced with the heavy pressure of provincial team selection, technical bottlenecks and injuries, he could only swim against the current with extraordinary perseverance. From the struggles of the city sports school to the cruel trials of the provincial team in the deep water area, Chen Mo constantly breaks through his own limits through sweat and tears, and uses every stroke to interpret the most stubborn persistence of ordinary people towards their dreams. This is a realistic masterpiece about competitive swimming, about growth, and about struggling to move forward in the torrent of reality.