Marine conservationist Shen Nian and deep-sea diver Gu Shen have been in love for seven years, but they suddenly broke up on the eve of their wedding and have been strangers ever since. Five years later, as the director of the aquarium, Shen Nian had to cooperate with Gu Shen, who had become an internationally renowned underwater photographer. When the veil of misunderstanding was lifted layer by layer, what awaited them was the cruelest joke of fate - Gu Shen's deep-sea disease has entered an advanced stage and his memory is gradually fading.
