A solitary schoolgirl, prone to sudden blackouts after she's stumbled into a murder scene, gets involved with her English teacher. Then, when his wife is also murdered, questions about what's real and what's made up start haunting her.

Emilia Fox
as Ann Devenish

James Purefoy
as David Miles

Oliver Milburn
as Lawrence Churchman

John Bowe
as Inspector Gates

Jim Carter
as Norman Devenish

Toby Whithouse
as DS Black

Victoria Wicks
as Miss Montrose

Anna Walton
as Melissa Barnett

Elizabeth McKechnie
as Christine Dobson

Jonathan Bailey
as Ben Devenish