[First in the Madison Barton Series] Madison Barton, Junior Agent for S.H.E.I.L.D., is determined to get her father back from Loki. Along the way, she falls in love. When her father returns, she is determined to get revenge on Loki for what he did and becomes an Avenger herself against her father's wishes. "I've always been the good little soldier. Daddy's blunt little instrument".