March, 1918. British newspapers carry the dreadful news that the GermanSpring Offensive has begun, w ith thousands of British lives lost. DetectiveSargeant Joe Keedy is awaiting release from hospital in London and is anxiousto resume the fight against crime on the Home Front.Late one night, a bank is raided by a gang and the villains escape by car with asizeable haul. Detective Inspector Harvey Marmion is put in charge of the case,but without Keedy at his side he faces an uphill battle to solve this perplexingcase.