Episode 1

When an impassive headmaster reports that his wife has gone missing to the police, her disappearance soon takes a sinister turn.

Episode 2

Annie is struck by Michael's strangeness in the wake of an awful discovery, but she also sees his vulnerability in the midst of the grimmest of tasks.

Episode 3

Michael expresses his discontent with the investigation during questioning, and Annie alights on a new suspect.

Episode 4

Annie and her colleagues begin to see things in a new light as fresh information continues to emerge.

Episode 6

The investigation hurtles towards a shattering conclusion.