Dolores tries to get closer to Liam Dempsey Jr. in order to get access to Rehoboam. Bernard decides to travel to Westworld, while Caleb tries to blend in neo-Los Angeles by working as a construction worker and a petty criminal.
Maeve finds herself in a virtual reality simulation and meets a ghost from the past. Meanwhile, Bernard returns to Westworld and tries to figure out whether Dolores tampered with his code.
The Charlotte host learns that Serac intends to control Delos, a fact complicating her already confused reality. Meanwhile, Dolores reveals a shocking truth to Caleb and the two join forces to bring Serac and Rehoboam down.
Serac offers Maeve a chance to meet her daughter in exchange for helping him. Bernard and Ashley try to kidnap Liam, mistaking him for Dolores's host. It is discovered that Dolores made several host copies of herself in order to fight off Serac.
Serac recounts that he created Rehoboam to save humanity from self-destruction. As Connells and Bernard manage to access Rehoboam, Connells sends Dolores warning files on Serac, and the whole world drowns in chaos. Caleb's past is revealed.
Serac gains access to Delos, causing a tragedy to Charlotte and thwarting her plans. Maeve tries to stop Dolores, while William starts therapy and tries to fight four different, mental versions of himself.
Caleb receives insights revealing true fragments of his past. Maeve tracks Dolores down, as the latter tries to replace Serac's plan for humanity with Jean Mi's.
Maeve takes Dolores to Serac, who deletes her memories, but not before she encourages Maeve to turn against Serac. A fight with William leaves Ashley dead, while Wiliam faces an unexpected enemy. Caleb's true role is revealed.