So how did Flight Lieutenant Kerrie Matheson, in his unarmed DH 86 transport, end up hurtling straight towards an enemy Bloch 220 Auvergne aircraft? Well, it had all started off as a routine secondment from his posting at Coastal Command. He became part of a mission to build a long distance air bridge, ferrying Allied planes from French-held Africa to Egypt. Then his routine flying duties took a deadly turn—with mystery, espionage and murder setting him on a Collision Course.