Katherine Barrett, a dedicated young doctor, receives a terrified phone call from her younger brother, TJ. He is running away to Mexico to save himself and their family from an unnamed killer. He warns her not to come after him and not to go to the police, as there is no one she can trust. But Katherine realizes there might be someone she can trust. . . .

Katherine Barrett, a dedicated young doctor, receives a terrified phone call from her younger brother, TJ. He is running away to Mexico to save himself and their family from an unnamed killer. He warns her not to come after him and not to go to the police, as there is no one she can trust. But Katherine realizes there might be someone she can trust. . . .