The story of Sinn Fein MP Martin McGuinness (Colm Meaney) and protestant minister and Democratic Unionist Party leader Ian Paisley (Timothy Spall) overcoming decades of fervent disagreement to find common ground in the historic 2006 St. Andrews Agreement is a great story.
Add a cast of notable Irish and English thespians and you'd be forgiven for having high expectations.
This should be tempered by the knowledge this is a fictional account about what may have happened when McGuinness hitched a lift to the airport with Paisley during the British-organised talks in Scotland.
Director Nick Hamm captures the tension of the event and adds a dose of humour, with a nervous Tony Blair (Toby Stephens) trying valiantly to keep discussions on topic. The film's success, however, depends on whether you buy into the idea of what happened when McGuinness and Paisley find themselves together in an SUV.
With talks at an impasse, Paisley must return to Belfast for his 50th wedding anniversary, and with the protocol for Northern Ireland politicians travelling by air to do so together, to avoid one side assassinating the other, McGuinness goes along for the ride.