As the wind accelerated the waves on the shore, Jeongin was wandering on the beach until he found an unconscious mermaid hitting the rocks. Were these magnificent creatures real...?.Because he did not know what to do, he secretly brought the mermaid to his house, filled the bathtub in the bathroom that was connected to his room with water and put you in it.Then he had to go downstairs because his parents had come home from work.But he must hide you from his parents.