Sybil Foster escapes from a psychiatric hospital, only to find herself the prime suspect in a series of murders. The police investigation, led by DS Doug Duvall unearths skeletons from her past, and a link to a prominent political figure who may hold the key to unlock the secrets of the past - and open the door to solving the mysteries of the present.
Joanne Froggatt
Gregor Fisher
Mhairi Steenbock
Ralph Ineson
Phyllis Logan
