The story of Claire Randall, a married combat nurse from 1945 who is mysteriously swept back in time to 1743, where she is immediately thrown into an unknown world where her life is threatened. When she is forced to marry Jamie, a chivalrous and romantic young Scottish warrior, a passionate affair is ignited that tears Claire's heart between two vastly different men in two irreconcilable lives.

Created from the novels by award winning crime writer Ann Cleeves, Shetland follows DI Jimmy Perez and his team as they investigate crime within the close knit island community. In this isolated and sometimes inhospitable environment, the team have to rely on a uniquely resourceful style of policing.

The show is about the Bannon family, who all have strong spy links. The parents, Dirk and Talia, were once arch enemy spies, but fell in love and got married. They now have three children who have all been brought up with spy techniques as a matter of course.