A new trailer for Outlander season 3 has debuted, and finds Jamie making an important promise to Claire.

Watch the new trailer below:

Outlander season 3 “picks up right after Claire travels through the stones to return to her life in 1948,” writes Starz. “Now pregnant, she struggles with the fallout of her sudden reappearance and its effect on her marriage to her first husband, Frank. Meanwhile, in the 18th century, Jamie suffers from the aftermath of his doomed last stand at the historic battle of Culloden, as well as the loss of Claire. As the years pass, Jamie and Claire attempt to make a life apart from one another, each haunted by the memory of their lost love. The budding possibility that Claire can return to Jamie in the past breathes new hope into Claire’s heart… as well as new doubt.

“Separated by continents and centuries, Claire and Jamie must find their way back to each other. As always, adversity, mystery, and adventure await them on the path to reunion. And the question remains: when they find each other, will they be the same people who parted at the standing stones, all those years ago?”

Outlander season 3 premieres this September with 13 episodes. It’s based on Diana Gabaldon’s Voyager.