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Master codebreaker Iris Nixon, once employed by charming entrepreneur Cameron Beck, is on the run in Sardinia - but her cover is blown.

With police and corrupt agents from Rome closing in, Iris blackmails local cop Teo in a bid for escape.

As Joy is captured, Iris seeks Teo's help. Iris and Joy enter uncharted territory, leading to a showdown with Cameron.

Iris is stripped of everything she's built. She escapes the island and contacts online conspiracy theorist Alfie.

Iris uses her wits to get out of a corner and enlist policewoman Nico. Joy meets the mysterious genius, Jensen Lind.

Iris devises a bold plan to save Joy, meets Cameron again, and must escape with Alfie and Nico.

Devastated by a setback, Iris makes a stand. Cameron's benefactor steps up control of his project.

Iris makes a potentially suicidal return to Caliburn, seeking answers. A final showdown between Iris, Cameron, Joy and Jensen exposes the terrifying true purpose of the device.