When the rational marine biologist Ruan Jing signed a contract marriage in the name of "data sampling" with the businessman Bingshan Lu Yan in response to family pressure, she firmly believed that emotions could be verified using scientific models. However, this marriage that started as a laboratory protocol has deviated from the preset track time and time again - an abnormal heartbeat in the aquarium, a life-saving rescue in the arctic danger, and even a deep love hidden for seven years, all of which made the cold data completely invalid. From strangers to heartbeats, from contract to sincerity, the two top men in their respective fields, in the intertwined collision of career and emotion, jointly performed a romantic deep-ocean love song in which rationality and sensibility are perfectly intertwined. When the heartbeat warning sounds, they will finally understand that the most sophisticated algorithm cannot calculate the vastness of love.