With Colonel Glenn Talbot now on their trail, Coulson and his team seek refuge in the last place anyone would look, where they begin to uncover S.H.I.E.L.D.'s most dangerous secrets. Secrets that could destroy them all.

Ward's betrayal and HYDRA's shocking secrets are revealed as Coulson's team goes undercover on a mission that leaves no one unscathed.

Dark secrets are revealed as Coulson and his team put everything on the line to stop Garrett and the forces of HYDRA.