With Logan and Emma away from the castle, Shona and Ewan are left in charge. The passion of their honeymoon is interrupted by an unexpected visitor seeking revenge on Rory MacLeod, who leaves them in desperate need to find the missing man. Unbeknownst to them, Rory has been transported to the future, where he is reunited with his long lost love, Moira, twin sister to Shona. Their attraction to each other still burns bright. As fate would have it, the four of them end up on a journey through the Highlands in an attempt to clear Rory's name and solve the mystery behind Moira and Shona's birth.