
Reclusive mathematician Stephen Ezard returns to England after years in China, finds his brother's widow, and becomes entangled in a plot involving a new national database (TIA) and a terrorist scheme.

Episode 1
Stephen Ezard returns home from China for his brother's funeral and finds himself drawn into an intrigue when he tries to determine the circumstances of his death.

Episode 2
Stephen continues his search for Yasim as two groups track his movements, TIA marketing intensifies at Parliament, and an unexpected illegal debarks at the port.

Episode 3
Russell saves Yasim and Stephen against his better judgment, the government becomes suspicious of Stephen, an unexpected player joins the game.

Episode 4
Stephen deals with a rival for Yasim's affections and sudden homelessness after his identity is removed from the database.

Episode 5
As Stephen finally pieces together the conspiracy, Michael's illness worsens and another moves to tie up all the loose ends.