Dr. Millican's synth, Odi, is old and begins malfunctioning, but he refuses to recycle him.
Joe and Sophie shop for a "synth," which is an artificially-intelligent robot that can help with domestic tasks.
Upon meeting her family's new synth, Laura feels angry that her husband has "replaced" her.
Niska is forced to work as a prostitute. Synths can legally be prostitutes because they do not have human rights.
Laura worries that Anita, her synth, has been lying to her and spending unauthorized time with Sophie, but Anita states that she is programmed not to lie.
Niska, disgusted by the man she meets as a customer at her job, kills a human.
A group of men called Headcrakers steal, mod (modify), and resell synths.
Leo and Max realize that Mia was modified by the Headcrackers.