Born to Egyptian parents and raised as a first-generation British Muslim, Luke Archer struggles to be from two worlds at the same time. He is working in a humanitarian mission in Aden, at the height of the Yemeni conflict. Max Gorsky, Luke's new patient, is a security contractor working for the government forces. Rebel forces have taken over the city, and Max's team is now taking refuge in the city's hospital, in preparation for their final stand. Luke and his team find themselves caught in a deadly clash between the ruthless rebel group and the desperate security contractors. At the same time, Max and Luke need to settle debts from their shared past in the UK where they joined forces in fencing a multi-million-dollar stolen artifact operation that went wrong.