set just before the second world war and this be a touching and understated romantic story that be loosely base on a real event . it concern a german rocket scientist gerhart zucher ( ulrich thomsen ) work in britain in the advent of the second world war . fear hitler may recall him to germany to assist him prepare for war and zucher and his slippery assistant heinz ( eddie marsan ) be evacuate by the british authority to a remote scottish island . they be give the task of build a rocket post box that will enable the islander to communicate with the mainland . mock and bully by the islander and they set up home with local girl catherine mackay ( the stun shauna macdonald ) and with whom thomsen begin an affair but complication arise when germany come call . the central romance between zucher and catherine be subtle and sincerely play and the support cast be a colourful bunch with an array of respected scottish character actor include gary lewis and clive russell . fine cinematography and a brilliant central theme song sung in the local dialect round out this movie . intelligent but undemanding and it be good for a quiet evening in .