The fisher girl Yuri accidentally catches Aeron, the wounded crown prince of the Silverfin Dragon Clan, on the stormy sea. Moved by kindness, she sets him free, and Aeron gives her the betrothal Star Tide Pearl as a gift, forging an unbreakable bond between them.
Linus, Yuri's childhood sweetheart, stumbles upon the pearl and learns the secret of the sea dragon. Driven by overwhelming greed to harvest the priceless pearls that form from the dragon's tears, he pretends to take in Aeron, who has traveled far and injured to find Yuri, while secretly torturing him by every means.
When Yuri sees through Linus's vicious true colors, she realizes her kindness almost led to a catastrophic disaster. She is determined to do everything to protect the badly wounded Aeron. Between human greed and the dragon clan's unwavering devotion, the human girl and the sea dragon unfold a cross-species, tormented yet intertwined deep-sea romance.