Secrets murder and mayhem collide as this unlikely sleuthing duo an underbutler and a foulmouthed octogerian hunt a killer in a manor sealed against the end of the worldCornwall 1910 On a remote tidal island the Viscount of Tithe Hall is absorbed in feverish preparations for the apocalypse that he believes will accompany the passing of Halleys Comet The Hall must be sealed from top to bottom every window chimney and keyhole closed off before night falls But what the pompous dishonest Viscount has failed to take into account is the danger that lies within By morning he will be dead in his sealed study murdered by his own ancestral crossbowAll eyes turn to Stephen Pike Tithe Halls newest underbutler Fresh out of Borstal for a crime he didnt commit he is the wrong man in the wrong place at the wrong time His unlikely ally Miss Decima Stockingham the foulmouthed sharp as a tack 80yearold family matriarch Fearless and unconventional she relishes chaos and puzzles alike and a murder is just the thrill shes been waiting forTogether this mismatched duo must navigate secret passages buried grudges and rising terror to unmask the killer before its too late