Evie, a child with both wolf and blood blood, became the object of competition between the two major groups of wolf and blood. In order to protect her daughter's safety, her mother Selena (Kate Beckinsale) had to take Evie to live in hiding. Maris (Tobias Menzies), who advocates violence and cruelty, became the new leader of the wolf clan. As soon as he took office, he sent his minions to carry out a crazy siege on the blood clan. Many bases of the blood clan were occupied by the wolf clan, and the situation was precarious. The vampire elder Semira (Lara Pulver) hopes to pardon Selena's exile, let her return to the blood clan camp, and help train vampire warriors to fight against the wolf clan. In the end, Selena returned. However, this group of vampires actually has another plan, which is to get Selena's blood.