Daviana Rose, a broken-hearted girl after her boyfriend's death—due to drowning in the sea, is having the fear of oceans and water, who faints if she gets in contact with it. One such fine day, on a cruise trip led by her high school, she gets lost by getting drunk in the party, falling into the side boat and finds herself on an island when she wakes up the next day. She is kidnapped by the pirates and through one such fight with them, she falls into the ocean.
Much to her surprise, before fainting, she sees that she gets a full grown tail and gills of a fish, like a mermaid. When she gets to her senses she comes to face a real underworld of mermaids and merfolk which is called the 'Silver Ocean'. There she learns that she is a daughter, named Arphine, of the dead Mermaid Goddess, when her eyes glisten golden blue and is cursed by her own mother, that she won't find love anytime and have betrothed her to the otherworldly immortal creature called, Caz Spiritguard, from the world 'Warl.'
When she learns why her own mother cursed her, she joins the people of Silver Ocean on the quest to restore her mother's and father's love story and to lift her curse and save the Silver Ocean from the wrath of Caz, which he will create, when he doesn't get Daviana for his own use and curse.
She falls in love with Caz at first sight, but he is unbothered due to his curse. Daviana marries Caz by sacrificing herself and her body as per her mother's curse to Caz, who feasts on her body everyday to keep himself alive and immortal.
But tables turn when she has fifteen days to melt his heart and make him hers and when a war breaks out between the Heavens and Warl.
Can Daviana lift the curse of her and Caz?
Will Caz fall for Daviana despite his curse?
Will they both survive the war?
Will Daviana succeed in this love and become the Mermaid Goddess after her mother?
Who will sacrifice what and for whom?