Escaping from poverty to become a witcher, Vesemir slays monsters for coin and glory, but when a new menace rises, he must face the demons of his past.

Beyond the human realm, there is a magical race of beings who control the tides and the changing of the seasons. One of these beings, a young girl named Chun, seeks something more—she wants to experience the human world! At sixteen, she finally gets her chance and transforms into a dolphin in order to explore the world that has her fascinated. But she soon discovers that it's a dangerous place and nearly gets killed in a vortex. Luckily, her life is spared when a young boy sacrifices himself to save her. Moved by his kindness and courage, she uses magic to bring him back to life only to learn that this power comes at a serious price. On a new adventure, she’ll have to make her own sacrifices in order to protect his soul until it is ready to return to the human world.

Geralt of Rivia, a mutated monster hunter, is hired to investigate a series of attacks in a seaside village and finds himself drawn into a centuries-old conflict between humans and merpeople. He must count on friends — old and new — to solve the mystery before the hostilities between the two kingdoms escalate into an all-out war.