Special Agent Mark Benford works for the Los Angeles Field Office of the FBI. A recovering alcoholic, Mark has been sober seven years and is a loving and committed family man, a family that includes his wife, Olivia, and daughter, Charlie. In the wake of the GBO, Mark finds himself at the center of the Mosaic Task Force, an investigation dedicated to uncovering who caused the GBO and why. Mark’s drive to piece together the mystery comes at a great personal sacrifice.