The staff unites to save one of their own. A former slave turned activist arrives in town, causing a rift between Foster and Mary. The Greens are in disarray; Emma and Frank’s romance ignites and Samuel plans for a reunion with Aurelia.

A house guest becomes the focus of Alice’s schemes. When Mary falls ill, Foster’s attempts to care for her antagonize the new chief. Charlotte tries to contain the smallpox epidemic and Samuel has to make a difficult decision.