The drama follows the intertwining paths of two Glasgow gangsters, once friends but now the heads of rival crews in Glasgow's gritty crime underworld. Veteran criminal Mick Turner discovers that his plans for a lucrative retirement have been scuppered by one of his own crew, while retired gangster Tommy Granger’s past is dug up when an old crew member comes knocking for money on the anniversary of the murder of Tommy’s son.

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.

Narrowly avoiding jail, new dad Robbie vows to turn over a new leaf. A visit to a whisky distillery inspires him and his mates to seek a way out of their hopeless lives.