A friendship forged between James and Tully in a small Scottish town in 1986. One weekend, they make a vow to each other to go at life differently. But then, 30 years on, half a life away, the phone rings. Tully has the worst kind of news.

When the death of a local oil magnate stuns Aberdeen, trainee detective Davis Lindo is thrown in at the deep end. Can he impress, or will his approach leave him out in the cold?