Assigned to San Antonio's Violent Crimes unit, Lucy Kincaid joins a team of seasoned veterans and newer agents for a task force called Operation Heatwave. It's supposed to be a simple sweep of known offenders with outstanding warrants. But when Lucy and her team try to bust two local brothers for jumping bail, she walks into a hotbed of pure evil. Their names are George and Jaime Sanchez. They are charged with murder, drug trafficking, and worse. And one of them is still out there.