When Cherringham choir stalwart Arthur Chisholm is robbed in the dead of night, ending up in hospital, it seems he’s just the victim of bad luck. Bad timing too, since he will now miss the choir's special holiday performance of Handel's Messiah - to be performed with scores of other local choirs, in London's Royal Albert Hall. But as more of their fellow choir members are burgled, Jack and Sarah realise these crimes are no coincidence. With just days before the concert, can they unravel...