Ianto has been keeping a secret from the rest of the Torchwood team: hidden in the basement is his girlfriend, Lisa Hallett, who was partly converted by the Cybermen during the Canary Wharf attack. He wants to return her to human form and works with Dr. Tanizaki to make her human again. He quickly loses control of the situation and when the Hub begins to lose power, the others are on to him. As a battle ensues, Ianto's must decide between his love for Lisa and his loyalty to the team.