Iris is an investigative reporter who refuses to accept that three deaths in two weeks were animal attacks. When her editor pairs her with a new reporter named Silas, she suspects he was sent to slow her down. Silas behaves strangely at every crime scene, and Iris finds a photograph of him at the river taken years before he joined the paper. Her investigation uncovers a triangle on the city map, a witness named Sarah Michaels who saw a giant wolf, and a family history her mother spent years hiding. Someone starts asking about Iris, and Silas convinces her to leave the city. At his cabin, the pack finds them, and a wounded scout shifts from wolf to man in front of her. Iris traces the victims to the jury that ruled on her mother’s death. She learns Silas was at the river that night and chose not to intervene. She throws him out, then works with him again when she realizes she cannot do this alone. As her own senses begin to change, she discovers her aunt has been selling her out and her editor has been coerced into helping. At the old mill, Iris shifts for the first time to save Silas and records her uncle Aldric confessing to her mother’s murder. The pack turns against him. Afterward, her mother’s journal and a letter from her father reveal that he is alive, and that the people who sent Silas may not be on her side. Iris publishes the story of the cover-up without mentioning wolves. She stands at the river at dawn with the letter in her hand, and she chooses her next step herself.