When Dr. Howard Latimer finds the German actress whom he had just met at the London Airport murdered in his flat, he is led into a world of murder, blackmail, and a fake passport scam.

Wanting a better life for herself and her unborn child, Amani goes on an illegal journey to flee Lebanon. However, the plan becomes at risk when a woman reports Amani to security while she is hiding in the bathroom stall of a British airport.

Threshold to the Kingdom sees artist Mark Wallinger play with the symbolism signalling a change in being. Slow motion footage of people arriving at London City Airport shows them delivered from the stateless limbo of international airspace to the sovereignty of UK soil and all it represents.