On the way to Scotland, Jamie is pulled back into the Revolutionary War. William is sent on a covert mission. Roger and Brianna struggle to adapt to life in the 1980s.

Claire and Ian arrive in Philadelphia to help the ailing Henry Grey. Roger and Buck receive an unexpected clue in their search for Jemmy.

Claire turns to John Grey for comfort as they process difficult news. Ian and Rachel discuss their love and their future. Brianna confronts an intruder at Lallybroch.

Brianna works to thwart a treacherous plan that endangers her family. A surprise encounter brings new understanding to Roger's journey in the past. Ian and Rachel take a big step in their relationship - as the Revolutionary war rears its head once again.