When police respond to a domestic disturbance in a Bay Area suburb, it's unclear who on scene was the intended victim. Further investigation reveals a body, a carefully collected kill kit, and a slew of evidence of a lethal plan for revenge,.

When a young mother and her newborn daughter vanish from Austin, detectives and FBI agents rush in to bring them home but instead uncover a heartbreaking motive, and a nine-month-long scheme to carry out the ultimate betrayal.