Tanta and Cole may have stopped the mass murder of InTech's residents, but the cost was severe. Despite their efforts, Harlow 2.0 - the update to InTech's mind-based operating system - fed out. Now its citizens are compliant zombies, and Tanta and her crew are trapped underground.

All except for Fliss, who has no system to update. She alone can go outside, and it's Fliss the crew are relying on to help get them out.

For only then can they dismantle the damage Harlow 2.0 has done. If Tanta, Cole and InTech's residents are to truly be free, it needs to be destroyed. But Tanta knows that task will put her on a collision course with the corporation that raised her, her oldest friends, and the woman who was once her soulmate.

And this last mission might ask more of her than she's able to give.