After an unexpected journey back in time left Henry and Julia Beauchamp lost and separated in the sweeping highlands of 18th century Scotland, Season One culminated with the two finally reuniting at the standing stones of Craigh na Dun, hoping to return to their own time and their young daughter, Claire. Season Two picks up at that moment and reveals a distraught Julia alone with their baby. Separated from his love and hope, Henry must grapple with his mental health, as he fights to find his way back to her.

Meanwhile, the forbidden relationship between Brian Fraser and Ellen MacKenzie seemed to conquer all odds, but their romantic escape was cut short as fiery crosses were lit and the 1715 Jacobite Rising began, thrusting the clans into war. In Season One, they chose each other over their families, but now they must prioritize their clan loyalties, as Brian fulfills his obligation to fight and Ellen seeks to make things right with her family.

As Season Two unfolds, the two young couples will be tested and separated once again by forces beyond their control, as every clan chooses a side in the rebellion.