As a boy, Freddie Musgrave ran contraband on the Tyne, but now, as a successful businessman, he seems to have it all. However, his troubled past comes back to haunt him, threatening his newfound security.
In Victorian Newcastle, secrets hidden for 18 years resurface when a stolen diamond with a distinctive reddish hue and a meeting between a young man and woman leads to forbidden love and a love triangle.
Belle is married to Marcel and begins to see signs he may not be the man she thought he was. Freddie has his own suspicions, and receives a hint that the key to the secret may be hidden in Harrogate.
Freddie and Belle learn the truth about Marcel in their own ways, which leads to a trap for each as Marcel tries to keep his secret.
