Ma Sung Jun, a part-time worker at an animal adoption cafe, discovers a lost dog of an unknown species after finishing his shift. Despite his usual preference for cats over dogs, Sung Jun inexplicably decides to bring the dog home. He affectionately names the dog Tani and leaves to gather the necessary supplies to care for his new companion.
However, when Sung Jun returns home, he is greeted by a startling sight. Tani is no longer a dog but has transformed into something completely different. The mysterious transformation leaves Sung Jun puzzled and intrigued. As he embarks on a journey to unravel the secrets behind Tani’s true nature, Sung Jun’s life takes an unexpected turn filled with wonder, curiosity, and the possibility of extraordinary connections beyond what he ever imagined.