It is 15th March 1941. 2 nights ago Singers Factory in Clydebank was heavily bombed and the famous clock tower damaged, along with the factory itself. Last night the Germans bombed again. Hundreds were killed or injured and thousands homeless. Only 7 houses in the town remain undamaged. The intelligence services are expecting other targets to be hit tonight and believe there is a spy directing the bonbers. Who is the spy? That's for you to find out in this thrilling mystery drama.