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.

The Treadstone project, having created super spy Jason Bourne, turns its attention on a new protocol to develop unstoppable superhuman assassins.