Cette production dérivée se concentre sur le mentor de Geralt, Vesemir et sur la chute de Kaer Morhen, le sanctuaire des sorceleurs. L'histoire explore sa formation en tant que sorceleur et sa bataille contre une puissance magique étrange, accompagné par une sorcière méfiante, Tetra Gilcrest. Il sera confronté au passé trouble de sa faction ainsi qu'à ses origines.

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.