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.

With their world turned upside down, Coulson races to save the life of his one true love as the mystery of "The Cellist," which began in Marvel's The Avengers, is finally revealed.